Q1. The average of five consecutive numbers is n. if the next two numbers are also included then the average will-
A.remain the same
B.increase by 1
C.increase by 1.4
D.increase by 2
EXPLANATION
(B). Increase by 1.
Average of 5 consecutive numbers= (n)+(n+1)+(n+2)+(n+3)+(n+4)/5= n+2
If 2 more consecutive numbers are added then its average=
(n)+(n+1)+(n+2)+(n+3)+(n+4)+(n+5)+(n+6)/7=n+3., hence average is increase by 1.
Q2. When a heap of pebbles are grouped in 32, 40, or 72 it is left with the remainder of 10,18 or 50 respectively. What is the minimum number of pebbles that the heap contains?
A.1416
B.1418
C.1412
D.1420
EXPLANATION
(B) 1418
Family of numbers when divided by A, B, and C leaves remainders X, Y, Z, respectively, such that a – X is equal to B – Y is equal to C – Z is equal to V are of the form. N= K.*LCM (ABC) – V.
Which is 1418.
Q3. Symbiosis runs a corporate training programme. At the end of runnung the first programme its total takings were Rs. 38950. There were more than 45 but less than 100 particulars. What was the participants fee the programme?
A.Rs. 410
B.Rs. 450
C.Rs. 500
D.. Rs. 510
EXPLANATION
(A) Rs 410.
Total taking is equal to number of participants multiply by cost per participant.
38950=2*52*19*41
Hence, 95 is the only factor. of 38950 which lies between 40 five to hundred. Hence, 95 is the number of participants. Cost per participant is equal to 38950 / 95 is equal to 410.
Q4. Three friends had a diner at the restaurant. When the bill was recived by amit paid 2/3 as much as veena paid and veena paid ½ as much as tanya paid. What fraction of the bill did veena pay?
A.1/3
B.3/11
C.12/31
D.5/8
EXPLANATION
(B) 3/11
Let the amount Tania paid be 6X
Amount paid by Veena is 3x
Then Amita paid by 2X=3x/6x+3X+2x=3/11.
Q5.A letter is lying against a wall which is 5 meters high. If the ladder slips 2 meters away from the wall, the top of the ladder touches the foot of the wall, the length of the ladder is.
- 5m
- 5.25m
- 7.75m
- 4m.
EXPLANATION
Let the length of the ladder be t metres
