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Questions (51)

the 2nd multiple of two numbers is 44 and one of the number is a prime number.find the(1) L. C. M of the number (2) the prime
1. 1 answer
2. 588 views
What is the PH of a 0.075M solution of the acid HA if the Ka for the acid is 4.8×10raise to power -8?
1. 0 answers
2. 419 views
9.60g of a gas X occupies the same volume at 0.30g of hydrogen under the same condition calculate the molar of X (H=1)?
1. 2 answers
2. 791 views
Factorize 8!-5(7!)A.4!7! B.3-7! C.4 x 7! D.3! X 7!?
1. 1 answer
2. 431 views
A woman is six times as old as her daughter.seven years ago,if the sum of their ages was 49.Find the age of the womanA.9 years
1. 2 answers
2. 882 views
a 2kg steel block is originally at 10°c. if 40kj of heat energy are added to the block, what is its final temperature?
1. 1 answer
2. 667 views
A radioactive source has a half-life of 6 days.How long will it take for the count rate to fall from 180 per minutes to 145.
1. 1 answer
2. 507 views
A bag contains 10 black balls and 15 white balls.if a ball is picked at random without replacement, what is the probability of
1. 1 answer
2. 514 views
What is the population of tridax with 53 frequency and 100 times of quadrant tossed in a land.?
1. 0 answers
2. 487 views
solve simultaneously0.5m +0.2n # 5........(1) 0.6m +0.4n # 8.4.......(2)?
1. 1 answer
2. 577 views
if the maximum voltage across a 100 ohm resistor is 20. then the maximum power it can dissipate is?
1. 2 answers
2. 744 views
two resistors R1=-4 ohms and R2=5 ohms, are connected parallel across a potential difference. if P1 and P2 represents the power
1. 1 answer
2. 1,465 views
a capacitor 8uf is charged to a potential difference of 100v. the energy stored by the capacitor is?
1. 2 answers
2. 2,092 views
A man invested a total of $50,000 in two companies.if these companies pay dividend of 6% and 8% respectively.How much did he
1. 1 answer
2. 585 views
There are five boys ________A) whom two were beaten B) of which two were beaten C) two of whom were beaten D) of whom two were
1. 5 answers
2. 1,089 views
Three boys play a game of luck in which their respective chances of winning are 1/2 1/3 and 1/4.What is the probability that one
1. 1 answer
2. 879 views
Two numbers are chosen at random from three numbers 1,3,5.Find the probability that the sum of the two is not odd?
1. 2 answers
2. 982 views
The probability of an event P is 3/4 while that of another event Q is 1/6.If the probability of both P and Q is 1/2.What is the
1. 1 answer
2. 374 views
If x,y can take values from the set (1,2,3,4),find the probability that the product of x and y is not greater than 6?
1. 1 answer
2. 550 views
(√6 + 2)^2 _(√6 _2)^2Surd?
1. 1 answer
2. 374 views
222Ra successfully looses 3 alpha particles and further 2 beta particles Write out the formula of n 88?
1. 0 answers
2. 456 views
x=[1,2,3,4,5,6],Y=[2,4,5,7],z=[1,4,5]
1. 1 answer
2. 353 views
evaluates log 0.225base10 if log 3 base10=0.477and log5base10=0.699?
1. 1 answer
2. 527 views
Calculate the mass of 3.7dm^3 of hydrogen at 21.5°c and a pressure of 102Pa?
1. 3 answers
2. 493 views
The first and last terms of an A.p are 10 and 90,if the sum of terms is 750,the number of terms is used to find the common
1. 1 answer
2. 1,102 views
In a box there are 10 T-shirts,15 long sleeve shirts and 25 gowns.If one attire is picked at random, what is the probability
1. 1 answer
2. 623 views
A heating instrument has 12 resistors and they are placed vertically and they have uniform reducing power.The power of the
1. 1 answer
2. 595 views
If i adds 2 to the numerator of a fraction,the fraction becomes 1/3.If he subtracts 3 from the denominator of the fraction,it
1. 1 answer
2. 2,371 views
1.0g of the oxide of metal x(atomic mass =64)gave 0.08g of the mental when reduced with hydrogen. the formula of oxide is?
1. 2 answers
2. 585 views
A heating instrument has 12 resistors and they are placed vertically and have a uniform reducing Power.The powers of the first,
1. 1 answer
2. 550 views
A trader realizes 25x-x^2 naira from the sale of X bags of rice.find the sum of bags that will give him the maximum profit?
1. 1 answer
2. 483 views
calculate the time taken for a car to cover a distance of 125m if the initial speed is 5m/s AMD it has a constant acceleration
1. 1 answer
2. 503 views
if 480.00 is borrowed for 3years simple intrest became 516. what was it rate?
1. 2 answers
2. 639 views
In how many ways can 7 directors sit round a tableA.720 B.120 C.24 D.5040?
1. 1 answer
2. 556 views
If 6Cr/6pr=1/6, find the value of r.A.1 B.3 C.5 D.6?
1. 1 answer
2. 836 views
factorise the followingm^2 - n^2 - mq - nq?
1. 2 answers
2. 508 views
factorise the following(1). 5ax - 5bx - a+b (2). m2 - n2 - mq - nq?
1. 1 answer
2. 662 views
A conductor has a diameter of 1.00mm and length 2.00m.if the resistance of the material is 0.1 ohms,it's resistivity isA.3.93
1. 1 answer
2. 704 views
For an electronic in nucleus make 180 revolution in 1.5 weeks what is the angular velocity of the electron?
1. 1 answer
2. 386 views
The densities of gases,X and Y are 0.5gdm³ and 2.0gdm³ respectively.what is the rate of diffusion of X relative to Y?A.4.0
1. 2 answers
2. 612 views
A cinema hall contains a number of people If 221/2% are children 471/2% are men and 84 are women find the number of men in the
1. 1 answer
2. 523 views
Five students were late to class and only three vacant seats were available. In how many ways can the seats be occupied?
1. 1 answer
2. 524 views
Three people share an inheritance in the ratio 2:3:4 and the share of the person who receives most is $5000. The share of the
1. 2 answers
2. 1,249 views
What is the remainder when f(x)=(x-2)^59 is divided by x-1?
1. 1 answer
2. 453 views
Which of the following is the smallest (clear calculation is required)2^600,3^500,4^400,5^300 Or 6^200?
1. 1 answer
2. 427 views
A milliammeter of resistance 2.5ohms and a full deflection of 50mA iS to be used to measure a potential difference of 50v.
1. 1 answer
2. 949 views
32g of anhydrous copper(ii)tetraoxosulphate(iv) dissolves in 1Dm3 of water generated 13.0KJ of heat,The heat of solution is
1. 2 answers
2. 947 views
calculate the length which corresponds to a temperature of 10°C has a linear expansivity of 2*10^-5K^-1. calculate the length
1. 0 answers
2. 444 views
calculate the quantity of electricity passed when 0.4A flows for 1hr 20minutes through an electrolytic cell.(a) 4800C (b) 3840C
1. 3 answers
2. 1,233 views
200cm3 of oxygen diffused through a porous plug in 50 secs,how long will 80cm3 of methane(CH4) take to diffuse through the same
1. 1 answer
2. 1,601 views
if V is the velocity of a wave, it'd wave length and T it'd period, the V, d and T are related by the expression?
1. 2 answers
2. 658 views

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