Question
Select the set in which the numbers are related in the
same way as are the numbers of the following sets. (34, 47, 62) (119, 142, 167) (NOTE: Operations should be performed on the whole numbers, without breaking down the numbers into its constituent digits. E.g. 13 β Operations on 13 such as adding /deleting /multiplying etc. to 13 can be performed. Breaking down 13 into 1 and 3 and then performing mathematical operations on 1 and 3 is not allowed)Solution
Logic:Β Subtract 2 from the squares of the consecutive numbers to get the numbers in the given sets. (34, 47, 62)Β βΒ (6)2β2=34;(7)2β2=47;(8)2β2=62βΒ (6)2β2=34;(7)2β2=47;(8)2β2=62βΒ (6, 7, and 8 are the consecutive numbers.) (119, 142, 167)Β βΒ (11)2β2=119;(12)2β2=142;(13)2β2=167βΒ (11)2β2=119;(12)2β2=142;(13)2β2=167β (11, 12, and 13 are the consecutive numbers.)ββ Explanation: β (a) (27, 38, 51)Β ββΒ (5)2β2=23β 27;(6)2β2=34β 39;(7)2β2=47β 51βΒ (5)2β2=23ξ =27;(6)2β2=34ξ =39;(7)2β2=47ξ =51βββ (b) (48, 65, 82)Β βΒ (7)2β2=47β 48;(8)2β2=62β 65;(9)2β2=79β 82βΒ (7)2β2=47ξ =48;(8)2β2=62ξ =65;(9)2β2=79ξ =82βββ (c) (64, 78, 99)Β βΒ (8)2β2=62β 64;(9)2β2=79β 78;(10)2β2=98β 99βΒ (8)2β2=62ξ =64;(9)2β2=79ξ =78;(10)2β2=98ξ =99βββ (d) (79, 98, 119)Β βΒ (9)2β2=79;(10)2β2=98;(11)2β2=119βΒ (9)2β2=79;(10)2β2=98;(11)2β2=119βββ Thus, only option (d) follows the same logic. Thus, the correct option is (d).
At present, Peter is Seven years younger than Adam. Adam’s age twenty years hence will be equal to thrice that of peter Five years ago. What will ...
The average of present ages of Rajesh and his father is 45 years. The age of Rajesh 5 years hence from now will be 1/4 of the pre...
The current ratio of the ages of 'Armaan' and 'Bittu' is such that six years from now, it will be 5:4, respectively. Presently, 'Chetna's age exceeds 'B...
The ratio of age of βBβ after 5 years from now and age of βCβ 4 years ago from now is 7:4, respectively. The present age of βCβ is 40% of th...
Aβs age is the fourth part of his fatherβs age. After 8 years, the age of Aβs father will be twice the age of B. If Bβs 7th birthday is celebrat...
A is younger than B by 4 years. If the ratio of A and B ages is 5:7 respectively, then find the age of A.
The sum of the ages of C and D after 10 years will be 100 years. If the ratio of their present ages is 9:7, find the difference between their ages.
- The average age of (x + 7) interns is 19 years. After adding a 41-year-old mentor, the average rises to 20 years. Find x% of 500.
Present age of βAβ is 40% more than that of βBβ. If 11 years hence from now, βBβ will be 10 years younger than βAβ, then find the sum of...
A is younger than B by 5 years. If the ratio of A and B ages is 7:8 respectively, then find the age of A.