 # Download Number Series Questions PDF for IBPS Clerk, RRB Clerk & RRB Scale 1 Pre 2020 at Smartkeeda

Important for :
1
121    145    171    199    229    264
» Explain it
A
 Series Pattern Given Series 112 + 0 = 121 121 ✓ 122 + 1 = 145 145 ✓ 132 + 2 = 171 171 ✓ 142 + 3 = 199 199 ✓ 152 + 4 = 229 229 ✓ 162 + 5 = 261 264 ✕

Therefore, there must be 261 in place 264.

Hence, option (A) is correct.
2
60    90    180    450    1360    4725
» Explain it
A
 Series Pattern Given Series 60 60 ✓ 60 + 60 × 0.5 = 90 90 ✓ 90 + 90 × 1 = 180 180 ✓ 180 + 180 × 1.5 = 450 450 ✓ 450 + 450 × 2 = 1350 1360 ✕ 1350 + 1350 × 2.5 = 4725 4725 ✓

Hence, option (A) is correct.
3
1    6    19    40    69    107
» Explain it
E
 Series Pattern Given Series 1 + 02 = 1 1 ✓ 2 + 22 = 6 6 ✓ 3 + 42 = 19 19 ✓ 4 + 62 = 40 40 ✓ 5 + 82 = 69 69 ✓ 6 + 102 = 106 107 ✕

Hence, option (E) is correct.
4
5    10    30    150    600    3600
» Explain it
C
 Series Pattern Given Series 5 × 1 = 5 5 ✓ 5 × 2 = 10 10 ✓ 10 × 3 = 30 30 ✓ 30 × 4 = 120 150 ✕ 120 × 5 = 600 600 ✓ 600 × 6 = 3600 3600 ✓

Hence, option (C) is correct.
5
25    55    115    235    480    955
» Explain it
E
 Series Pattern Given Series 10 + 15 = 25 25 ✓ 25 + 30 = 55 55 ✓ 55 + 60 = 115 115 ✓ 115 + 120 = 235 235 ✓ 235 + 240 = 475 480 ✕ 475 + 480 = 955 955 ✓

Hence, option (E) is correct.