A. 19 1/7 min
B. 15 1/7 min
C. 17 1/7 min
D. 7 1/7 min
✅ The correct answer is option C. 17 1/7 min.
Mathematics MCQs
A brick measures 20 cm * 10 cm * 7.5 cm how many bricks will be required for a wall 25 m * 2 m * 0.75 m?
A. 24000
B. 23000
C. 22000
D. 25000
✅ The correct answer is option D. 25000.
25 * 2 * 0.75 = 20/100 * 10/100 * 7.5/100 * x
25 * 2 * 0.75 = 20/100 * 10/100 * 7.5/100 * x
C takes 6 days to complete half of a work and D takes 5 days to complete 1/3rd of the same work. They take turns to complete the task. If C works for the first 4 days, in how many days will D complete the rest of the work without the help of C?
A. 10 days
B. 12 days
C. 8 days
D. 9 days
✅ The correct answer is option A. 10 days.
Part of work completed by C in 1 day = 1/12 Part of work completed by D in 1 day = 1/15 Part of work completed by C in 4 days
Part of work completed by C in 1 day = 1/12 Part of work completed by D in 1 day = 1/15 Part of work completed by C in 4 days
= 1/3 Work remaining = 2/3 Time taken by D to complete the work
= (2/3)÷(1/15) = 10 days
The area of a square is 4096 sq cm. Find the ratio of the breadth and the length of a rectangle whose length is twice the side of the square and breadth is 24 cm less than the side of the square.
A. 18 : 5
B. 7 : 16
C. 5 : 14
D. None of these
✅ The correct answer is option D. None of these.
Let the length and the breadth of the rectangle be l cm and b cm respectively. Let the side of the square be a cm.
Let the length and the breadth of the rectangle be l cm and b cm respectively. Let the side of the square be a cm.
While selling the watch, a shopkeeper gives a discount of 5% if he gives a discount of 7 % he earns Rs. 15 less as profit. The marked price of the watch is:
A. Rs. 697.50
B. Rs. 712.50
C. Rs. 787.50
D. None of these
✅ The correct answer is option D. None of these.
(i). a2 – 7a + 12 = 0, (ii). b2 – 3b + 2 = 0 to solve both the equations to find the values of a and b?
A. if a < b
B. if a ≤ b
C. if the relationship between a and b cannot be established.
D. if a > b
✅ The correct answer is option D. if a > b.
In a rhombus whose area is 144 sq.cm on of its diagonals is twice as long as the other. The lengths of its diagonals are:_________?
A. 24 cm,48cm
B. 12cm,24cm
C. 6√2cm,12√2cm
D. 6cm,12cm
✅ The correct answer is option B. 12cm,24cm.
The diameters of two spheres are in the ratio 1:2 what is the ratio of their surface area?
A. 1:2
B. 1:4
C. 2:1
D. 4:1
✅ The correct answer is option B. 1:4.
If 3 men or 4 women can construct a wall in 43 days, then the number of days that 7 men and 5 women take to construct it is :
A. 12 days
B. 14 days
C. 16 days
D. 18 days
✅ The correct answer is option C. 16 days.
The value of a plant depreciates by 10 % annually. If the present value of the plant is Rs. 100000, then what will be its value after 2 years?
A. Rs. 8000
B. Rs 10000
C. Rs. 18000
D. Rs. 81000
✅ The correct answer is option D. Rs. 81000.