Puzzle - Study Mode
[#11] A man used to rob the computers and He is active only for quarter of a year. He robs three computers Vayu, Tejas and Agni. January was unfortunate month for Tejas. Vayu was stolen in March. Now he used three tools Pliers, Screwdriver and Hook to rob all the parts from the computer and Make His own computer. He Rob Monitor from Tejas but Does not use hook. He robs Printer from Vayu and Use Pliers. And from Third Computer he robs Keyboard. i) In which month was Agni stolen? ii) Which tool was used for Tejas?
Correct Answer
(C) February, Screwdriver
Explanation
Solution: January was unfortunate for Tejas, means Tejas was stolen in January. Vayu was stolen in March. So, Agni was stolen in February. He robs Printer from Vayu, uses Pliers. Hook was not used for Tejas for Screwdriver was used to rob Tejas.
[#12] How many such pairs of letters are there in the word SENDING, each of which has as many letters between its two letters as there are between them in the English alphabets?
Correct Answer
(D) Three
Explanation
Solution: Only Three such pairs, I (N) G D (IN) G
and S (ENDI) N
[#13] A lad was asked his age by his friend . The lad said, "The number you get when you subtract 25 times my age from twice the square of my age will be thrice your age". If the friend's age is 14, then the age of the lad is :
Correct Answer
(C) 14
Explanation
Solution: Option Checking : Considering option 3, 2 *(14) 2 - 25*14 = 3*14. Alternatively : Let the age of the lad be x then, 2x 2 -25x = 42. 2x 2 -25x-42 = 0. Either solve the quadratic equation or put the options to get the value.
Option 3 is correct.
[#14] A Parking lot Contains 160 Vehicles. Each Vehicle is either a car or a truck, and each vehicle is either red or green. 70 vehicles are red, and 120 vehicles are cars. If there are 18 green trucks, how many red cars are there?
Correct Answer
(C) 48
Explanation
Solution: Total number of Vehicles = 160 There are 70 red vehicles thus rest 90 are green vehicles, out of which 18 are green trucks then we get, Green cars = 90 - 18 = 72. Given, Number of cars = 120. Then, number of red cars, = 120 - 72 = 48 Red cars.
[#15] Grass in lawn grows equally thick and in a uniform rate. It takes 24 days for 70 cows and 60 days for 30 cows to eat the whole of the grass. How many cows are needed to eat the grass in 96 days?
Correct Answer
(B) 20 Cows
Explanation
Solution: Let initially X grass was present there,and it is increasing by Y grass per day, then for the first condition We get, X+24*y = 24*70 ----(1) For the 2nd condition, we have, X+60*Y = 60*30----(2)
Now, On solving equation (1) and (2), we get X = 1600 and Y = 10 /3 Third Condition, X+96*Y = 96 *N -----(3) [ N = Number of Cows required ] Putting the values of X and Y in equation (3), We get N = 20.