Chapter: 4th Maths : Term 1 Unit 6 : Information Processing
Exercise 6.1 (Systematic Listing)
1.
What are the possible ways to write three digit number without repeating these numbers?
Solution:
792, 729, 297, 279, 927
2.
In a hotel, you have to choose a tiffin and a drink. Here is the list.
List the possible combinations systematically.
Solution:
1. Idly & Tea
2. Idly & Coffee
3. Idly & Milk
4. Poori & Tea
5. Poori & Coffee
6. Poori & Milk
7. Dosai & Tea
8. Dosai & Coffee
9. Dosai & Milk
10. Pongal & Tea
11. Pongal & Coffee
12. Pongal & Milk
3.
Kavin has four cards
9 7 4 6
a. List down all 3−digit numbers possible with these cards (without repetition).
Answer:
974, 947, 794, 749, 479, 497, 746, 764, 476, 467, 674, 647, 496, 469, 649, 694, 946, 964,
b. What is the largest 4−digit odd number that can be made without repeating the numbers?
Answer:
9753
4.
There are 6 sprinters (an athlete who runs fast in short race). In how many different ways 3 medals (Gold, silver and bronze) be allocated?
Solution:
1) Gold, Silver, Bronze
2) Gold, Bronze, Silver
3) Silver, Gold, Bronze
4) Silver, Bronze, Gold
5) Bronze, Gold, Silver
6) Bronze, Silver, Gold