Natni

The average scores of the last four tests taken by Mike is 86 marks. To raise the scores to 92 marks, at least how many times does Mike have to get 100 marks in a row? Please help me to solve this one! Thanks a lot🙏

How many different values can be formed by using only four 50-cent coins, four 1-dollar coins, four 2-dollar coins and four 5-dollar coins? Please help me to solve this one🙏

If digits are not to be used with repetition, find the number of four- digit odd numbers divisible by 15 which can be formed by using 0,2,3,5,6,7, and 9? Answer: 30 The answer is 30, but I don't know how to get 30, please help me how to solve it🙏

Numbers are drawn from the 27 integers 1 to 27. At least how many number(s) is / are drawn at random to ensure that there are two numbers whose difference is divisible by 4? Please help me to solve this one😩🙏🙏

Amy does some special operations when she sums up numbers. If the answer is greater than 100, she will subtract 10 from it; if the answer is lower than 100, she will add 10 to it; otherwise, no change will be made to the answer. For example: 87 + 16 ( 93...

Thanks a lot, it helps me a lot🙏

I still don't understand🙏 why must sum to 10 or 13 or 16 etc.? Can we use combination to solve it?

You can use combination. There are 6 digits: 3, 8, 1, 2, 5, 7 So the combination digits will be: 6*5*4*3*2 = 720