Mental Ability Test Part – I Questions ¼1–5½ Directions : In each question there is a number series with one term missing shown by question mark (?). This term is one of the alternatives among the four numbers given under it. That number is– 1. 8, 7, 16, 5, 32, 3, 64, 1, 128, (?) (1) 18 (2) 13 (3) –1 (4) 3 Ans. [3] Sol. Combination of two series 8, 16, 32, 64, 128, 7, 5, 3, 1, ? ∴ ? = – 1 2. 16, 33, 65, 131, (?), 523 (1) 261 (2) 521 (3) 613 (4) 721 Ans. [1] Sol. Rule : ×2 + 1, ×2 – 1, ×2 + 1, ×2 – 1 IInd term IIIrd term IVth term Vth term ∴ 16 × 2 + 1 = 33 33 × 2 – 1 = 65 65 × 2 + 1 = 131 131 × 2 – 1= 261 3. 5, 2, 17, 4, (?), 6, 47, 8, 65 (1) 29 (2) 30 (3) 31 (4) 32 Ans. [3] Sol. Series consists two rules Ist is 2, 4, 6, 8, .... IInd is 5 + 12 = 17 17 + 14 = 31 31 + 16 = 47 47 + 18 = 65 4. 1, 2, 4, 8, (?), 32 (1) 10 (2) 12 (3) 14 (4) 16 Ans. [4] Sol. Series is 20, 21, 22, 23, 24, 25 ∴ 24 = 16 5. 2, 3, 10, 15, 26, (?) (1) 36 (2) 35 (3) 39 (4) 48 An...
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