Tag: ways to multiply and divide

Questions Related to ways to multiply and divide

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..

$1\displaystyle \div 28$  is ___

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

  1. $28$

  2. $1$

  3. $0$

  4. $\displaystyle \frac{1}{28}$

Show answer
Correct Option: D
Explanation:

1 $\displaystyle \div $ 28 = $\displaystyle \frac{1}{28}$

64 $\displaystyle \div $ 1 is ____

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

  1. 1

  2. 0

  3. 46

  4. 64

Show answer
Correct Option: D
Explanation:

64$\displaystyle \div $ 1 = 64

238 $\displaystyle \div $ 238 is ____

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

  1. 0

  2. 238

  3. 28

  4. 1

Show answer
Correct Option: D
Explanation:

238 $\displaystyle \div $ 238 = 1

$(98 + 14) \displaystyle \times $ 0 is _____

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

  1. $114$

  2. $112$

  3. $0$

  4. $0 \times 98 + 14$

Show answer
Correct Option: C
Explanation:

(98+ 14) $\displaystyle \times $ 0 = 0

Any number multiply by 0,then the answer will be zero.

The property satisfied by the division of whole number is

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

  1. closure property

  2. commutative property

  3. associative property

  4. none of these

Show answer
Correct Option: D
Explanation:
OPTION A- A set is closed under an operation if performance of that operation on members of the set always produces a member of that set. For example, the positive integers are closed under addition, but not under subtraction: is not a positive integer even though both 1 and 2 are positive integers.

OPTION B- Division of the whole numbers is not commutative. If a and b are the two whole numbers, then a ÷ b ≠ b ÷ a.

OPTION C- The associative property states that you can add or multiply regardless of how the numbers are grouped. By 'grouped' we mean 'how you use parenthesis'. In other words, if you are adding or multiplying it does not matter where you put the parenthesis. 

So the correct answer is none of these, option D.

One symbol represents 5 ballons then number of symbols to be drawn to represent 60  ballons is

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

  1. 5

  2. 60

  3. 10

  4. 12

Show answer
Correct Option: D
Explanation:

$\Rightarrow$  $1$ symbol represents $5$ balloons.

$\Rightarrow$ Number of symbols represents $60$ balloons $=\dfrac{60}{5}$
                                                                               $=12$
$\therefore$  Required answer is $12$.

The unit's digit in the product 274 x 318 x 577 x 313 is :

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

  1. 2

  2. 3

  3. 4

  4. 5

Show answer
Correct Option: A
Explanation:

Multiplying unit digit of each number we get 672 hence 2 is the unit digit of the product.

Solve $ 7.86 \times 4.6 =$

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

  1. 36.156

  2. 36.216

  3. 351.56

  4. 361.56

Show answer
Correct Option: A
Explanation:

The value of $7.86 \times 4.6 $

$= (8-0.14)(4+0.6) $
$= 32+4.8-0.56-0.084$
$ = 36.8-0.644$
$ = 36.156$

$3897\times 999=$?

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

  1. $3883203$

  2. $3893103$

  3. $3639403$

  4. $3791203$

  5. None of these

Show answer
Correct Option: B
Explanation:

$3897\times 999=3897\times (1000-1)$
$=3897\times 1000-3897\times1$
$=3897000-3897$
$=3893103$