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Earn +20 ptsQ: What is the missing number 12 15 22 5 X 25 15 21?
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What is the missing number 8 5 21 35 32 12 32 28 31 4 x 28?
-2
Twenty-one is 12 percent of what number?
21 = (.12)(x) 21 / .12 = x Answer: 175
What is the next number in the series 3 6 9 21 51 81?
12. you're doing multiples of 3 and the tens and ones places are just reversed in the writing- 3 6 9 12 15 18 21=3 6 9 21 51 81 12
If 10 is the 4Th triangular number what is the 6Th?
21
What number is between 15 and 27?
The number at the midpoint of these two numbers is (15 + 27)/2 = 21
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