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Q21. Let x, y, z be three positive integers satisfying y = 3x, z = 4x, x + y + z = 3k, k is an integer. Which of the following is the smallest value of k for which x, y, z are even number?

N = aebfcg is a six- digit number where a, b, c, e, f, g are six digit; If a = e, b = f and c = = g then which of the given informations is not correct?

Q23. A mother purchase three shirts of the same color but of different size for her three sons. All the three shirts were kept in a box in a dark room. The three boys took one shirt each at random from the box. What is the probability that none of the boys this own shirt?

Q24. Product of three consecutive numbers is 2730. What is the sum of three numbers?

Q. Sum of the ages of a boy and his father is 70 years. Before 20 years Father's age was 14 times the age of the boy. What was the age of father at the time of birth of the child?

Q What will be the probability that k1*k2*k3 is an even number, if k1, k2, k3 are 3 positive integers taken randomly.

Q27. What is the sum of all the four digit numbers formed using the digits 0, 1, 2 and 3. None of the two digits should be repeated.?.

Q. There are 5 lines in a plane. Difference between maximum and minimum number of intersecting points. No two lines are parallel

Q29. How many words can be formed by using all the letters of the word MASTERCHEF at a time if you have to arrange these letters in the same manner as these letters are arranged in english alphabet? (! represents factorial in options)

Q . 1,4,9,16,...... sum of this sequence upto 20 terms will be

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202 days 3 hours 26 minutes ago

why is the answer for the first question x+y+z=3k given as 16? can it not be 12 ?

1593 days 15 hours 38 minutes ago

No. It cannot be 12.

If it is 12, then x+3x+4x=3*12; ==> 8x=36; which is not possible.

1525 days 5 hours 28 minutes ago

total 8 cases possible . (2^3), out of wch, a product can be odd only when all numbers are odd. wch is just 1 case so remaining 7 cases will be of even product. hence ans is 7/8.

1765 days 21 hours 39 minutes ago

where are the solutions?

I got 9 correct in 16 minutes.

this question- there are 5 lines in plane. difference between max and min intersecting points (no two lines are parallel)

max points of intersection= 10

min. 0

difference- 10-0=10

so why does the answer say 9?

1898 days 5 hours 56 minutes ago

all lines intersecting at one point is that one case

1887 days 22 hours 13 minutes ago

0 intersection means all are parallel but the condition is no two line are not parallel.

that's why minimum intersection is all lines passing through single point.

1880 days 6 hours 57 minutes ago

given, B+F=70

14(B-20)=F-20,

Solving this two equations, we get B=22 and F=48,

and the question is age of father when boy was not born so 48-22=26

1904 days 4 hours 24 minutes ago

x+3x+4x=3k ; k= 8x/3 ,check values in the options for even x.

1765 days 21 hours 36 minutes ago

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