Question

pls answer 40 points! REVISION TEST – 6V - SEPTEMBER- 13 TH 1)Find the missing digit so that the given number is divisible by 11 a) 2*583 2) The length of a floor is 4 m 44 cm and the breadth is 3 m 30 cm. What is the maximum length of square tiles that can completely cover the floor? 3) There are four bells, which toll at intervals of 3,7,12 and 14 seconds respectively. The four bells begin to toll at 12 O’clock. When will they next toll together ? 4)The traffic lights at three different road crossings change after every 48 seconds,72 seconds and 108 seconds respectively. If they change simultaneously at 7a.m after what time will they change again simultaneously? 5) Simplify:50-42÷3 of 7-(20+5)÷5x2 6) The sum of two fractions is 616 .If one of the fractions is 213.Find the other fraction 7)A man purchased 20 litre of vegetable oil.He gave 5 3/5 litre of oil to his son and 6 1/5 litre to his daughter.Find the oil left with him.

Answer 1

Answer:

HI MATE !

1]

According to the question,

The missing digit in the given numbers are

• a) missing digit 2

actual number = 22583

• b) missing digit 3

actual number = 37345

As in the question the answers 2258337345 are divisible by 11.

2]

Length of floor = 4 m 44 cm =[ (4*100) + 44 ]

cm = 444 cm.

Breadth of floor = 3 m 30 cm = [ (3*100) + 30 ] cm = 330 cm.

GCD ( Greatest Common Divisor ) means to take out the highest common divisor of two positive integers.

Now, we will take Greatest Common Divisor of

both numbers,

• 444 = 2 * 2* 3 * 37
• 330 = 2 * 3 * 5 * 11

GCD of 444 and 330 = 2 * 3 = 6 We took those factors which were common in both and multiplied.

Maximum Length of the square tile =>

Greatest number which divides both length and breadth of floor i.e. GCD of 444 and 330 Maximum Length of the square tile => 6 cm

The maximum length of square tiles that can completely cover the floor is 6 cm.

3]

LCM ( 3 , 7 , 12 , 14 ) = 84

84 sec = 1 min 24 sec

The next toll together is 12:01 24 sec.

14 min = 840 sec

840 ÷ 84 = 10

So, they do so 10 times in 14 min.

4]

REFER THE ABOVE PIC/ATTACHMENT.

5]

YOU NEED TO DO WITH BODMAS RULE

50 - 42 ÷ 3 x 7- (20+5) ÷ 35 x 2

= 50 - 42- 3 x 7 - 25 - 5 x 2

= 50 - 14 x 7 - 5 x 2

= 50 - 98 - 10

= 50 - 108

= -58

So -58 is the answer.

6]

REFER THE ABOVE PIC/ATTACHMENT.

7]

Your answer is 23/4L.

Hope my answer helps you.. ✌️

☺️