Second number is one more than twice the first third number is one less than twice the second fourth number is one more than twice the third fifth number is one less than the fourth Therefore, the sixth number is one more than twice the fifth. So, the missing number is 75
Q26. 165, 195, 255, 285, 345, (...)
A. 435
B. 375
C. 420
D. 390
Answer- Option A
Explanation-
Each number is 15 multiplied by a prime number i.e, 15 x 11, 15 x 13, 15 x 17, 15 x 19, 15 x 23. So, the next number is 15 x 29 = 435.
Q27. Find the wrong number in the series: 3, 8, 15, 24, 34, 48, 63
A. 14
B. 15
C. 34
D. 63
Answer- Option C
Explanation-
The difference between consecutive terms are respectively 5, 7, 9, 11 and 13. So, 34 is wrong number.
