SBI questions with answer set 1

Q. What will come in place of the question mark (?) in the following number series? 
          18, 29, 42, 53, ?, 77
Answer 66
EXPLANATION
   Given number series
        18, 29, 42, 53, ?, 77
   The pattern is as follows
             18 + 11 = 29
             29 + 13 = 42
             42 + 11 = 53
             53 + 13 = 66
             66 + 11 = 77

Q.What should come in place of question mark (?) in the following number series?
              36, 18, 6, 3, 1, ?
Answer 0.5
EXPLANATION
Given number series 36, 18, 6, 3, 1, ?
 The pattern is as follows:
               36/2 = 18
               18/3 = 6
                 6/2 = 3
                 3/3 = 1
                 1/2 = 0.5

                                        

Q. What will come in place of the question mark (?) in the following number series?
               256, ?, 190, 167, 148, 131
Answer 219
EXPLANATION
      Given number series
            131 + 17 = 148
            148 + 19 = 167
            167 + 23 = 190
            190 + 29 = 219
            219 + 37 = 256

Q. What should come in place of the question mark (?) in the following number series? 
                8, 6, 9, 23, ?
Answer 87
EXPLANATION
Given number
          8, 6, 9, 23, ?
 The pattern of given series is:
         8 x 1 - 2 = 6
         6 x 2 - 3 = 9
         9 x 3 - 4 = 23
       23 x 4 - 5 = 87

Q. What should come in place of question mark (?) in the following number series?
                  1, 244, 163, 190, 181, ?,
Answer 184
EXPLANATION
Given number series
             1, 244, 163, 190, 181, ?,
 The pattern is as follows
                 1 + 243 = 244
                244 - 81 = 163
               163 + 27 = 190
                  190 - 9 = 181
                 181 + 3 = 184

Q. What should come in place of question mark (?) in the following question?
           600 + 300 ÷ 15 = ? × 31
Answer 20
EXPLANATION
Addition and subtraction can be treated on same priority (from left to right) when they are in consecutive order.
        600 + (300/15) = ? × 31
        600 + 20 = ? × 31
        ? = 620/31 = 20

Q. What should come in place of question mark (?) in the following question?
           41% of 600 - 250 = ? - 77% of 900
Answer 689
EXPLANATION
      41% of 600 - 250 = ? - 77% of 900
       246 - 250 =? - 693
       246 - 250 +693 =?
       ? = 689

Q. What should come in place of question mark (?) in the following question? 
        52000 ÷ 40 ÷ 65 × 30 = ? - √400
Answer
EXPLANATION
        52000 ÷ 40 ÷ 65 × 30 = ? -√400
       (52000 ÷ 40) ÷ 65 × 30 = ? - 20
       (1300 ÷ 65) × 30 = ?- 20
       20 × 30 = ? - 20
       600 = ? - 20
       ? = 620