1. How many such pairs of digits are there in the number 531268947 each of which has as many digits between them in the number as when they are arranged in descending order?
(a) 2
(b) 3
(c) 4
(d) more than 4
Ans.(d)
Sol. The given number is 531268947
Arranging the digits in descending order, we get: 987654321
We have the following pairs of digits, satisfying the given conditions
Digits in Given number
|
Digits in Descending Order
|
5 3 1 2
|
5 4 3 2
|
3 1 2 6
|
6 5 4 3
|
1 2
|
2 1
|
1 2 6 8 9 4 7
|
7 6 5 4 3 2 1
|
2 6 8 9 4 7
|
7 6 5 4 3 2
|
8 9
947
|
9 8
987
|
2. Unscramble the letters in the given words and find the odd one out:
(a) EIWNTR
(b) UMRSME
(c) PIGRSN
(d) LCUOD
Ans.(d)
Sol. Rearranging the letters, the given words are:
(a) WINTER (b) SUMMER (c) SPRING (d) CLOUD
Clearly, all except CLOUD are names of seasons.
Hence, the answer is (d).
3. In the given series of letters, how many P’s are preceded and followed by t?
P t P t t P P t P t P P P q q P t P t t P P P t
(a) 0
(b) 2
(c) 3
(d) 4
Ans.(c)
Sol. There are three P’s in the given letter series.
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