Tag: mental multiplication

Questions Related to mental multiplication

$\displaystyle 178\times \quad ....... = 0 $

maths ways to multiply and divide mental multiplication multiplication methods multiplication of numbers

  1. 1

  2. 178

  3. 0

  4. None of these

Show answer
Correct Option: C
Explanation:

178*0=0

remember
any number multiplied by zero then result is zero..

Product of 7,986 is 548 is

maths ways to multiply and divide mental multiplication multiplication methods multiplication of numbers

  1. 1,35,562

  2. 43,76,328

  3. 1,35,862

  4. 1,35,462

Show answer
Correct Option: B
Explanation:

$7986$
$\underline {\times 548}$
63888
319440
$\underline {3993000}$
$\underline {4376328}$

14 apples cost Rs. 140 The cost of 1 apple is___

maths ways to multiply and divide mental multiplication multiplication methods multiplication of numbers

  1. $Rs.\ 10$

  2. $Rs.\ 8$

  3. $Rs.\ 4$

  4. $Rs.\ 14$

Show answer
Correct Option: A
Explanation:

14 apples = 140
1 apple = $\displaystyle \frac{140}{14}$ = Rs. 10

Suman quickly estimated the product of $796\times 19$ in the following manner. He rounded each number to the nearest ten.
He multiplied these new numbers together.
What was Suman's estimate?

maths ways to multiply and divide mental multiplication multiplication methods multiplication of numbers

  1. $14,000$

  2. $15,010$

  3. $15,200$

  4. $16,000$

Show answer
Correct Option: D
Explanation:

$796\xrightarrow {\text {rounded to nearest tens}}800$
$19\xrightarrow {\text {rounded to nearest tens}}20$
$\therefore 800\times 20=16,000$

Which of the following is divisible by $11$?

maths ways to multiply and divide mental multiplication multiplication methods multiplication of numbers

  1. $3178$

  2. $325182$

  3. $710345$

  4. $457192$

Show answer
Correct Option: B
Explanation:

Sum of odd place digits $=2+1+2=5$
Sum of even place-digits $=8+5+3=16$
Difference of above two sums $=16-5=11$
The difference 11 is divisible by 11
$\therefore$ 3,25,182 is also divisible by 11.

Add the $4^{th}$ multiple of 52 and the $8^{th}$ multiple of 37. The value obtained is 700 less than $\clubsuit$. Find $\clubsuit$.

maths ways to multiply and divide mental multiplication multiplication methods multiplication of numbers

  1. 1400

  2. 504

  3. 968

  4. 1204

Show answer
Correct Option: D
Explanation:
Let the value of sign be $x$.

According to the question,
$4\times 52+8\times 37=x-700$
$208+296=x-700$
$x=1204$

Hence, this is the answer.

Farmer Gopal packed an equal number of oranges into each of the 15 baskets. If each basket contained 85 oranges, how many oranges did he pack ?

maths ways to multiply and divide mental multiplication multiplication methods multiplication of numbers

  1. 100

  2. 1527

  3. 1275

  4. 1725

Show answer
Correct Option: C
Explanation:

Each basket contained $=85$ oranges


Therefore, the number of oranges in $15$ baskets
$=15\times 85$
$=1275$

hence, this is the answer.

If O represents 5 eggs then how many eggs does OOOO represent?

maths ways to multiply and divide mental multiplication multiplication methods multiplication of numbers

  1. $4$

  2. $16$

  3. $20$

  4. $25$

Show answer
Correct Option: C
Explanation:

Given,

Number of eggs represented by 1 "O" = $5 eggs$

Now, 
Number of eggs represented by OOOO i.e 4 O's = $4 \times 5 = 20$ eggs

In a school, there are 704 desks to place into 22 classrooms. If the same number of desks is placed in each classroom, how many desks will be there in each room ?

maths ways to multiply and divide mental multiplication multiplication methods multiplication of numbers

  1. 32

  2. 34

  3. 42

  4. 44

Show answer
Correct Option: A
Explanation:

In a school, there are $704$ desk to place into $22$ classrooms.

If the same number of desks is placed in each classroom, then

desks will be there in each room

$=\dfrac{704}{22}$

$=32$

 

Hence, this is the answer.

The numbers $35, 7035, 385$ is divisible by

maths ways to multiply and divide mental multiplication multiplication methods multiplication of numbers

  1. $5$

  2. $7$

  3. both $5$ & $7$

  4. none

Show answer
Correct Option: C
Explanation:

These numbers are divisible by 5 and 7..