Q: Which number completes the series 1 3 6 10 15?

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75The number which best completes the sequence 10 30 15 16 48 24 25 is 75.

75.

10 ten

75 (times 3, divided by2, plus 1)

10 4 3 11 15 9 8 16 20....

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75The number which best completes the sequence 10 30 15 16 48 24 25 is 75.

Nn

What number best completes the sequence 1 1/2 5 10 1/2 18

75

75.

25-1=24 24-2=22 22-3=19 19-4=15 15-5=10 The next number in the series is 10.

the answer is 1

10

10 ten

The series 1 6 10 13 15 (1+5=6; 6+4=10, 10+3=13; 13+2=15) is completed by 15+1=16. The answer is 16.

10.

75 (times 3, divided by2, plus 1)