Evidence and Missing Information Worksheet

Critical thinking lesson 9: Enough evidence and missing information · Set 446 · 40 questions

Thinking tip (Enough facts, then decide): Not enough evidence: “One mango was sour, so all are sour.” Enough: “We checked all 40 mangoes; every one was ripe.” Before you answer, check every fact you need is given. 7 rows with 9 in each → 7 × 9 = 63. “A box has 9 in each row” with no number of rows → not enough info. Missing facts hide in words like “and a bag”, “older” (by how much?) and “a long film” (how long?).

1. 1.True or false: “It rained on my birthday once, so it always rains on birthdays.” gives enough evidence. (a) True (b) False
2. 2.🧩 Enough evidence or not? “A dog barked at me once, so all dogs are mean.” (a) enough evidence (b) not enough evidence
3. 3.🧩 Arjun bought 5 notebooks for ₹175 in all. Each notebook cost the same. What did one notebook cost? (a) ₹40 (b) not enough info (c) ₹175 (d) ₹35
4. 4.🧩 Vihaan is 10 years old. Ishaan is older than Vihaan. How old is Ishaan? (a) 15 (b) not enough info (c) 11 (d) 12
5. 5.📝 What does “evidence” mean? (a) a rumour (b) a guess (c) a loud opinion (d) facts that support it
6. 6.🧩 Enough evidence or not? “We asked all 30 classmates; 25 chose the zoo trip.” (a) not enough evidence (b) enough evidence
7. 7.True or false: “We tested 20 seeds, and 18 of them sprouted.” gives enough evidence. (a) True (b) False
8. 8.🧩 Nisha bought 4 pens for ₹40 in all. Each pen cost the same. What did one pen cost? (a) ₹15 (b) not enough info (c) ₹40 (d) ₹10
9. 9.🧩 A box of apples has 8 in each row. How many apples are in the box? (a) 80 (b) not enough info (c) 8 (d) 16
10. 10.🧩 Ananya bought 4 balls and a lunch box for ₹220 in all. Each ball cost the same. What did one ball cost? (a) not enough info (b) ₹220 (c) ₹55 (d) ₹216
11. 11.🧩 Enough evidence or not? “We tried the new route for 10 days, and it was faster every day.” (a) enough evidence (b) not enough evidence
12. 12.🧩 Enough evidence or not? “We checked all 40 mangoes in the box; every one was ripe.” (a) enough evidence (b) not enough evidence
13. 13.🔬 Why do scientists repeat an experiment? (a) to be sure of results (b) to change answers (c) for fun only (d) to waste time
14. 14.🧩 Diya is 12 years old. Nisha is 2 years older than Diya. How old is Nisha? (a) 2 (b) 14 (c) not enough info (d) 15
15. 15.📊 Which gives the best evidence about the class’s favourite game? (a) asking one friend (b) asking the whole class (c) asking your pet (d) guessing
16. 16.True or false: “We tried the new route for 10 days, and it was faster every day.” gives enough evidence. (a) True (b) False
17. 17.🧩 Saanvi bought 6 balls for ₹90 in all. Each ball cost the same. What did one ball cost? (a) ₹20 (b) not enough info (c) ₹15 (d) ₹90
18. 18.🧩 A box of mangoes has 7 in each row. How many mangoes are in the box? (a) 14 (b) 70 (c) 7 (d) not enough info
19. 19.🧩 Meera bought 3 balls and a bag for ₹115 in all. Each ball cost the same. What did one ball cost? (a) ₹115 (b) not enough info (c) ₹112 (d) ₹38
20. 20.🧩 Before solving a word problem, first check… (a) what facts are given (b) your handwriting (c) the colour of ink (d) the page number
21. 21.True or false: “My friend didn’t like the book, so the book is bad for everyone.” gives enough evidence. (a) True (b) False
22. 22.🧩 Enough evidence or not? “My friend didn’t like the book, so the book is bad for everyone.” (a) not enough evidence (b) enough evidence
23. 23.True or false: “We measured the plant every day for a month; it grew 9 cm.” gives enough evidence. (a) False (b) True
24. 24.🧩 Enough evidence or not? “One mango in the box was sour, so all the mangoes are sour.” (a) enough evidence (b) not enough evidence
25. 25.🧩 Enough evidence or not? “One student said the canteen food was cold, so it is always cold.” (a) enough evidence (b) not enough evidence
26. 26.🧩 Meera bought 5 notebooks and a bag for ₹190 in all. Each notebook cost the same. What did one notebook cost? (a) not enough info (b) ₹185 (c) ₹190 (d) ₹38
27. 27.🧩 A box has 8 rows of oranges, with 4 in each row. How many oranges are in the box? (a) 36 (b) not enough info (c) 32 (d) 12
28. 28.🧩 Meera is 11 years old. Diya is 7 years older than Meera. How old is Diya? (a) 7 (b) 19 (c) 18 (d) not enough info
29. 29.True or false: “We checked all 40 mangoes in the box; every one was ripe.” does not give enough evidence. (a) False (b) True
30. 30.True or false: “We tried the new route for 10 days, and it was faster every day.” does not give enough evidence. (a) False (b) True
31. 31.🧩 The film starts at 4 PM and lasts 2 hours. When does it end? (a) 4 PM (b) 7 PM (c) not enough info (d) 6 PM
32. 32.🧩 Diya is 7 years old. Meera is 3 years older than Diya. How old is Meera? (a) not enough info (b) 11 (c) 10 (d) 3
33. 33.True or false: “We asked all 30 classmates; 25 chose the zoo trip.” does not give enough evidence. (a) False (b) True
34. 34.🧩 A box has 5 rows of guavas, with 7 in each row. How many guavas are in the box? (a) not enough info (b) 35 (c) 12 (d) 42
35. 35.🧩 A box of eggs has 5 in each row. How many eggs are in the box? (a) 50 (b) 5 (c) not enough info (d) 10
36. 36.🧩 Arjun is 9 years old. Aarav is 4 years older than Arjun. How old is Aarav? (a) not enough info (b) 14 (c) 4 (d) 13
37. 37.🧩 Meera is 7 years old. Tara is older than Meera. How old is Tara? (a) 12 (b) 8 (c) 9 (d) not enough info
38. 38.🧩 A box of mangoes has 9 in each row. How many mangoes are in the box? (a) 9 (b) 90 (c) 18 (d) not enough info
39. 39.🧩 A box has 6 rows of apples, with 5 in each row. How many apples are in the box? (a) not enough info (b) 30 (c) 35 (d) 11
40. 40.🧩 A box has 5 rows of laddoos, with 6 in each row. How many laddoos are in the box? (a) 30 (b) not enough info (c) 11 (d) 36

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