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NCERT Solutions for Class 4th Maths Chapter 9 Multiplication word problems — Let Us Solve

Book page 139 Updated on2026-09-19

Q1.
A flock of 25 geese and 12 sheep have gathered around a pond. Chippi the lizard sees many legs. How many legs does it see?
Answer
The picture in the book: a small pond with a flock of 25 white geese standing on the left and 12 sheep standing behind a fence on the right. Each goose has 2 legs and each sheep has 4 legs.

Chippi sees 98 legs.

Geese legs: 25 × 2 = 50
(20 × 2 = 40 and 5 × 2 = 10, so 40 + 10 = 50)

Sheep legs: 12 × 4 = 48
(10 × 4 = 40 and 2 × 4 = 8, so 40 + 8 = 48)

All legs: 50 + 48 = 98 legs
Why it happens: Geese and sheep have different numbers of legs, so we count the two equal groups separately and then add.
Q2.
In an auditorium, 8 children are sitting in each row. There are 15 such rows in the school auditorium. How many children are in the auditorium?
Answer
15 rows of seats with 8 children in each row.

There are 120 children in the auditorium.

15 rows = 10 rows + 5 rows
10 rows: 10 × 8 = 80 children
5 rows: 5 × 8 = 40 children
15 rows: 80 + 40 = 120 children
Why it happens: Every row holds the same 8 children, so 15 equal rows is 15 × 8.
Q3.
A book shop has kept 9 books in each pile. There are 14 such piles. How many books does the shop have?
Answer
14 piles with 9 books in each pile.

The shop has 126 books.

14 piles = 10 piles + 4 piles
10 piles: 10 × 9 = 90 books
4 piles: 4 × 9 = 36 books
14 piles: 90 + 36 = 126 books
Check it yourself: Count in 9s — 9, 18, 27, 36, 45, 54, 63, 72, 81, 90, 99, 108, 117, 126. That is 14 nines.
Q4.
Surya is making a patch work with beads of two colours as shown in the picture.
Surya’s patch work of golden and white beads.
How many beads has he used? How many each of golden colour beads and white colour beads has he used in making this patch work?
Answer
Surya’s patch work. The beads are laid in blocks of 4, golden and white by turns.

Surya has used 160 beads in all — 80 golden and 80 white.

Count one row: 16 beads
Count the rows: 10 rows
Total beads: 16 × 10 = 160

In every row the colours go 2 golden, 2 white, 2 golden, 2 white …
So each row has 8 golden and 8 white beads.
Golden: 8 × 10 = 80  White: 8 × 10 = 80
Check: 80 + 80 = 160
Why it happens: The beads are set in a neat array, so counting one row and the number of rows is enough. The two colours take equal turns, so they split the total in half.
Q5.
For each of the following multiplication problems, make your own stories as above. Then find out the product. a) 34 × 3 b) 75 × 5 c) 46 × 6 d) 50 × 9
Answer

Sample stories and answers:

  • a) 34 × 3 — A rickshaw has 3 wheels. How many wheels do 34 rickshaws have?
  • b) 75 × 5 — A pack has 5 marbles. How many marbles are in 75 packs?
  • c) 46 × 6 — A carton holds 6 mangoes. How many mangoes are in 46 cartons?
  • d) 50 × 9 — A garland has 9 flowers. How many flowers are in 50 garlands?
a) 34 × 3 = (30 × 3) + (4 × 3) = 90 + 12 = 102
b) 75 × 5 = (70 × 5) + (5 × 5) = 350 + 25 = 375
c) 46 × 6 = (40 × 6) + (6 × 6) = 240 + 36 = 276
d) 50 × 9 = five 90s = 450
Tip: Always break the bigger number into tens and ones. Tens are easy, ones are small — then add the two parts.
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