 Important for :
1
45     54     79     128     189     330     499
» Explain it
C
 Series Pattern Given Series 45 45 ✓ 45 + 32 = 54 54 ✓ 54 + 52 = 79 79 ✓ 79 + 72 = 128 128 ✓ 128 + 92 = 209 189 ✕ 209 + 112 = 330 330 ✓ 330 + 132 = 499 499 ✓

Hence, there should be 209 in place of 189.

Hence, option C is correct.
2
4     16     5     625     6     1296     7     16807
» Explain it
D
 Series Pattern Given Series 41 4 ✓ 42 = 16 16 ✓ 51 = 5 5 ✓ 53 = 125 625 ✕ 61 = 6 6 ✓ 64 = 1296 1296 ✓ 71 = 7 7 ✓ 75 = 16807 16807 ✓

Hence, there should be 125 in place of 625.

Hence, option D is correct.
3
9     10     19     58     231     1166    6935
» Explain it
B
 Series Pattern Given Series 9 9 ✓ 9 × 1 + 1 = 10 10 ✓ 10 × 2 – 1 = 19 19 ✓ 19 × 3 + 1 = 58 58 ✓ 58 × 4 – 1 = 231 231 ✓ 231 × 5 + 1 = 1156 1166 ✕ 1156 × 6 – 1 = 6935 6935 ✓

Hence, there should be 1156 in place of 1166.

Hence, option B is correct.

4
520     720     1025     1320     1740     2184
» Explain it
A
 Series Pattern Given Series (83 + 8) = 520 520 ✓ (93 – 9) = 720 720 ✓ (103 + 10) = 1010 1025 ✕ (113 – 11) = 1320 1320 ✓ (123 + 12) = 1740 1740 ✓ (133 – 13) = 2184 2184 ✓

Hence, there should be 1010 in place of 1025.

Hence, option A is correct.

5
256     252     240     228     192     156     112
» Explain it
E
 Series Pattern Given Series 256 256 ✓ 256 – (4×1) = 252 252 ✓ 252 – (4×3) = 240 240 ✓ 240 – (4×5) = 220 228 ✕ 220 – (4×7) = 192 192 ✓ 192 – (4×9) = 156 156 ✓ 156 – (4×11) = 112 112 ✓

Hence, there should be 220 in place of 228.

Hence, option E is correct.