16. 1 is added to the difference each time: 1 + 1 = 2 2 + 2 = 4 4 + 3 = 7 7 + 4 = 11 11 + 5 = 16 [the missing number] 16 + 6 = 22
c) 17
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Oh honey, that's just a simple pattern of squares. The missing number is 16 because 1 squared is 1, 2 squared is 4, 3 squared is 9, and 4 squared is 16. It's basic math, darling.
16. 1 is added to the difference each time: 1 + 1 = 2 2 + 2 = 4 4 + 3 = 7 7 + 4 = 11 11 + 5 = 16 [the missing number] 16 + 6 = 22
6
c) 17
The factors of 16 are 1, 2, 4, 8 and 16. I don't know which one is missing.
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49 The sequence is the squares of numbers that increase by 3 each time: 1² = 1 (1 + 3 )² = 4² = 16 (4 + 3)² = 7² = 49 (7 + 3)² = 10² = 100 (10 + 3)² = 13² = 169
The next two number in the series are: 5 & 16
256 (each number is the square of the preceding number)
The first five prime numbers starting from 1 are 1, 2, 3, 5, 7. So 2 is the missing number.
The missing number is 26. The number after 29 is 58.
-16 ÷ -2 = (-1)(16)/(-1)(2) = 16/2 = 8