Total Questions: 32
42 : 18
Hence, 10 : 9 is the correct answer.
2809 : 53 : 1524 : ?
2nd number = [{(sum of digit of 1st number) × 3} - number of digit]
2809 = [{(2 + 8 + 0 + 9) × 3} - 4] = 53 Similarly,
1524 = [{(1 + 5 + 2 + 4)× 3} - 4] = 32
Hence, 32 is the correct answer.