Page 208 - Start Up Mathematics_4

Problem-Based Learning

1. Alka’s teacher asks her to find the predecessor of 16,844. She then asks her to add 2
to the predecessor and then find the successor of the newly formed number. She also
asks her to add all the three numbers. What is the sum of all the three numbers?

(a) 50,522 (b) 50,544 (c) 50,533 (d) 50,511
2. Some students are standing in a row. Sameer is occupying position V from the left
and position IX from the right. How many students are there in the row?

(a) 14 (b) 12 (c) 13 (d) 11
3. Raj’s mother asks him to bring 725 packets of sweets for his sister’s engagement. Each
packet costs ` 350. She asks him to give the sweets to all his relatives. After distributing
the sweets, 270 packets are left which he returns to the shopkeeper. The shopkeeper
deducts ` 20 for each packet on return. How much money does Raj get back?

(a) ` 89,000 (b) ` 89,100 (c) ` 82,100 (d) ` 87,100
4. Mrs Sen, Mrs Gupta and Mrs Arora are teachers in a school. Mrs Sen is 35 years
old. Mrs Gupta is 4 years older than Mrs Sen and Mrs Arora is 3 years younger than
Mrs Gupta. How old is Mrs Arora?

(a) 37 years (b) 36 years (c) 39 years (d) 38 years
5. Which of the following figures fits in the given pattern?

^ ^ ^ ^ ^ ^ ^ ^ ^ ^ ^
^ ^ ^ ^ ^ ^ ^ ^ ^ ^ ?
^ ^ ^ ^ ^ ^ ^ ^ ^

^ ^ ^ ^ ^ ^ ^ ^ ^
(a) ^ ^ (b) ^ ^ ^ (c) ^ ^ (d) ^ ^ ^
^ ^ ^ ^ ^ ^ ^ ^ ^ ^

6. Mitali tries to simplify the following problem.
16 × 70 – 9 × 17 – 13 × 45 + 38 × 13

What answer will she get?
(a) 776 (b) 875 (c) 876 (d) 877

7. Ravi spends 12 hours in a week on self study excluding Sunday. He has his exams
in the coming month. He plans to add 1.5 hours everyday to his studying time and
also plans to study for 4 hours on Sunday. There are three weeks left for the exam.
Following this schedule, how many hours will Ravi devote to studies in three weeks?

(a) 70 hours (b) 75 hours (c) 73 hours (d) 72 hours

8. A factory produces 7,525 bicycles in a month. It gets an order in which it has to deliver
9,825 bicycles within a month. Keeping in mind that there are only 25 working days

20
2000