All about CBI

Q) In the given figure, the geometric symbols have their regular meaning. Value of x is   a) sqrt(6)       b) sqrt(7)          c) sqrt(8)        d) sqrt(9) It is a school level question. Previous question here . It is solvable in less than 30 seconds provided you know the trick that i will be discussing in the book . Your answer only with a logical explanation is welcomed in the comments section.

Q) The value of 29% of 124 + 31% of 84 is a) 80       b) 71          c) 53      d) 62 Previous week question here . Next week question here . It is solvable in less than 20 seconds provided you know the trick that i will be discussing in the book . Your answer only with a logical explanation is welcomed in the comments section.

Q) If (1 + 1/a)^(a+1) = (1 + 1/100)^100, then the value of 'a' is ____ Previous question here . It is solvable in less than 40 seconds provided you know the trick that i will be discussing in the book . Your answer only with a logical explanation is welcomed in the comments section.

Q) If x = 1998^3 − 1992^3, the value of √ ((x/18) - 3) is a) 1994       b) 2004          c) 1995      d) 1986 Previous question here . It is solvable in less than 40 seconds provided you know the trick that i will be discussing in the book . Your answer only with a logical explanation is welcomed in the comments section.

Q) In the given figure, AB = 3, BC = 40 and CD = 6 units. ∠ B = ∠C = 90. Point E is a random point on line segment BC. The least possible value of AE+ED is   a) 44       b) 43          c) 42        d) None of these No differentiation or higher engineering mathematics involved in this question. It is a school level question. Previous question here . Next week question here . It is solvable in less than 45 seconds provided you know the trick that i will be discussing in the book . Your answer only with a logical explanation why it is the least value possible is welcomed in the comments section.

Q) In the given figure, two squares are placed inside an equilateral triangle. The angle asked as below is a) 110       b) 115          c) 120      d) 125 Previous question here . Next week question here . It is solvable in less than 30 seconds provided you know the trick that i will be discussing in the book . Your answer only with a logical explanation is welcomed in the comments section.

Q) If the sum of a number and all its digits is 66666, the product of the digits in that number is a) 1728       b) 2826          c) 1602        d) 2718 Previous question here . Next week question here . It is solvable in less than 45 seconds provided you know the trick that i will be discussing in the book . Your answer only with a logical explanation is welcomed in the comments section.

Q) The value of "X" in the below image is a) √ 61        b) √ 71          c) √81        d) None of these   It is a question to trap you. Previous question here . Next week question here . It is solvable in less than 45 seconds provided you know the trick that i will be discussing in the book . Your answer only with a logical explanation is welcomed in the comments section.

Q) If 111...11A22...22 is a 39 digit number and divisible by 7, the value of "A" is a)  0      b) 1          c) 2        d) 3 Previous question here . Next week question here . It is solvable in less than 45 seconds provided you know the trick that i will be discussing in the book . Your answer only with a logical explanation is welcomed in the comments section.

Q) The biggest possible three digit number "abc" such that (a x b x c) + ( a x b ) + ( b x c ) + ( a x c ) + a + b + c = 29 is a)  421      b) 307          c) 540        d) None of these Previous question here . Next week question here . It is solvable in less than a minute provided you know the trick that i will be discussing in the book . Your answer only with a logical explanation is welcomed in the comments section.