Question
Average of 8 numbers is 25. If average of first four and
last two numbers is 15 and 40, respectively then find the fifth number given that ratio of fifth and sixth number is 7:5, respectively.Solution
Let fifth and sixth numbers be ‘7x’ and ‘5x’, respectively. So, 7x + 5x = 25 × 8 – 15 × 7 – 40 × 5 = 60 Or, 12x = 60 Or, x = 5 So, fifth number = 5 × 7 = 35
147      138       120      93      ?      12
...48Â Â Â Â 61 Â Â Â Â 76 Â Â Â Â 94Â Â Â Â 116 Â Â Â Â Â ?
21 23 26 ? 39 51
...The following numbers form a series followed by a (?). Find the odd one out first and then find that what will come in place of the question mark (?) ac...
In the question, three series I, II and III are given. Find the value of x, y and z to establish the correct relation among them and choose the correct...
8, 9, 15, ?,82.5, 250.50
There are three series given below which are following with the same pattern.
Series I: 9, 10, 32, 163, 1145
Series II: 4, B, C, D, E
...18 113 559 2247 6721 13451
...48Â Â Â 83Â Â Â 118Â Â Â 153Â Â Â 188Â Â Â ?
9256Â Â Â Â Â Â 6844Â Â Â Â Â Â 4888Â Â Â Â Â Â 3350Â Â Â Â Â 2152Â Â Â Â Â Â 1276
...
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