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Number is 11.

1 (+1) 2 (+2) 4 (+3) 7 (+4) 11 (+5) 16 ...

Q: What is the missing number in 1 2 4 7 - 16?

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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

36

-8

The next two number in the series are: 5 & 16

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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.

36

-8

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