Evidence and Missing Information Worksheet

Critical thinking lesson 9: Enough evidence and missing information · Set 875 · 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.🧩 Tara bought 3 pens and a bag for ₹115 in all. Each pen cost the same. What did one pen cost? (a) not enough info (b) ₹112 (c) ₹115 (d) ₹38
2. 2.True or false: “We measured the plant every day for a month; it grew 9 cm.” gives enough evidence. (a) True (b) False
3. 3.🧩 Ananya is 10 years old. Rohan is older than Ananya. How old is Rohan? (a) 12 (b) 11 (c) not enough info (d) 15
4. 4.🧩 Enough evidence or not? “My friend didn’t like the book, so the book is bad for everyone.” (a) enough evidence (b) not enough evidence
5. 5.🧩 Enough evidence or not? “We asked all 30 classmates; 25 chose the zoo trip.” (a) not enough evidence (b) enough evidence
6. 6.🧩 Rohan bought 5 kites for ₹250 in all. Each kite cost the same. What did one kite cost? (a) ₹55 (b) ₹50 (c) ₹250 (d) not enough info
7. 7.🧩 Enough evidence or not? “We checked all 40 mangoes in the box; every one was ripe.” (a) not enough evidence (b) enough evidence
8. 8.🧩 The film starts at 3 PM and lasts 2 hours. When does it end? (a) 5 PM (b) 6 PM (c) not enough info (d) 3 PM
9. 9.True or false: “We tested 20 seeds, and 18 of them sprouted.” does not give enough evidence. (a) False (b) True
10. 10.True or false: “It rained on my birthday once, so it always rains on birthdays.” does not give enough evidence. (a) True (b) False
11. 11.🔬 Why do scientists repeat an experiment? (a) for fun only (b) to change answers (c) to waste time (d) to be sure of results
12. 12.🧩 A box has 8 rows of mangoes, with 5 in each row. How many mangoes are in the box? (a) not enough info (b) 45 (c) 40 (d) 13
13. 13.True or false: “One mango in the box was sour, so all the mangoes are sour.” does not give enough evidence. (a) False (b) True
14. 14.🧩 Before solving a word problem, first check… (a) what facts are given (b) the colour of ink (c) your handwriting (d) the page number
15. 15.True or false: “We tried the new route for 10 days, and it was faster every day.” does not give enough evidence. (a) True (b) False
16. 16.🧩 Rohan bought 5 kites for ₹225 in all. Each kite cost the same. What did one kite cost? (a) not enough info (b) ₹225 (c) ₹45 (d) ₹50
17. 17.🧩 The film starts at 5 PM and lasts 3 hours. When does it end? (a) not enough info (b) 5 PM (c) 9 PM (d) 8 PM
18. 18.🧩 Kabir is 12 years old. Ishaan is 3 years older than Kabir. How old is Ishaan? (a) 15 (b) 3 (c) 16 (d) not enough info
19. 19.🧩 Diya is 10 years old. Vihaan is older than Diya. How old is Vihaan? (a) 15 (b) 12 (c) not enough info (d) 11
20. 20.📝 What does “evidence” mean? (a) a rumour (b) a guess (c) facts that support it (d) a loud opinion
21. 21.True or false: “We asked all 30 classmates; 25 chose the zoo trip.” does not give enough evidence. (a) True (b) False
22. 22.🧩 The film starts at 4 PM and lasts 2 hours. When does it end? (a) 6 PM (b) 4 PM (c) not enough info (d) 7 PM
23. 23.🧩 Enough evidence or not? “We tested 20 seeds, and 18 of them sprouted.” (a) enough evidence (b) not enough evidence
24. 24.True or false: “We measured the plant every day for a month; it grew 9 cm.” does not give enough evidence. (a) True (b) False
25. 25.🧩 The film starts at 4 PM. It is a long film. When does it end? (a) 6 PM (b) 5 PM (c) not enough info (d) 7 PM
26. 26.True or false: “A dog barked at me once, so all dogs are mean.” does not give enough evidence. (a) False (b) True
27. 27.🧩 Rohan bought 2 kites and a lunch box for ₹120 in all. Each kite cost the same. What did one kite cost? (a) ₹118 (b) ₹60 (c) not enough info (d) ₹120
28. 28.🧩 The film starts at 4 PM and lasts 1 hour. When does it end? (a) 4 PM (b) 6 PM (c) 5 PM (d) not enough info
29. 29.True or false: “A dog barked at me once, so all dogs are mean.” gives enough evidence. (a) True (b) False
30. 30.🧩 Enough evidence or not? “It rained on my birthday once, so it always rains on birthdays.” (a) enough evidence (b) not enough evidence
31. 31.🧩 Enough evidence or not? “One mango in the box was sour, so all the mangoes are sour.” (a) enough evidence (b) not enough evidence
32. 32.🧩 The film starts at 3 PM. It is a long film. When does it end? (a) 4 PM (b) 5 PM (c) not enough info (d) 6 PM
33. 33.🧩 Enough evidence or not? “We measured the plant every day for a month; it grew 9 cm.” (a) enough evidence (b) not enough evidence
34. 34.🧩 Ananya is 9 years old. Rohan is older than Ananya. How old is Rohan? (a) 14 (b) not enough info (c) 10 (d) 11
35. 35.🧩 Vihaan is 8 years old. Arjun is 3 years older than Vihaan. How old is Arjun? (a) 12 (b) 3 (c) not enough info (d) 11
36. 36.🧩 Nisha bought 3 notebooks for ₹135 in all. Each notebook cost the same. What did one notebook cost? (a) not enough info (b) ₹135 (c) ₹50 (d) ₹45
37. 37.🧩 Enough evidence or not? “One student said the canteen food was cold, so it is always cold.” (a) not enough evidence (b) enough evidence
38. 38.🧩 Meera is 12 years old. Tara is older than Meera. How old is Tara? (a) 14 (b) not enough info (c) 17 (d) 13
39. 39.📊 Which gives the best evidence about the class’s favourite game? (a) asking the whole class (b) asking one friend (c) asking your pet (d) guessing
40. 40.🥭 You taste one mango from a box of 50, and it is sweet. Can you be sure all 50 are sweet? (a) no mango is sweet (b) yes, it is certain (c) yes, mangoes match (d) no, check more

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