Evidence and Missing Information Worksheet

Critical thinking lesson 9: Enough evidence and missing information · Set 105 · 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.🔬 Why do scientists repeat an experiment? (a) for fun only (b) to change answers (c) to waste time (d) to be sure of results
2. 2.🧩 Enough evidence or not? “We checked all 40 mangoes in the box; every one was ripe.” (a) not enough evidence (b) enough evidence
3. 3.True or false: “A dog barked at me once, so all dogs are mean.” gives enough evidence. (a) False (b) True
4. 4.True or false: “My friend didn’t like the book, so the book is bad for everyone.” does not give enough evidence. (a) False (b) True
5. 5.🥭 You taste one mango from a box of 50, and it is sweet. Can you be sure all 50 are sweet? (a) no, check more (b) yes, mangoes match (c) yes, it is certain (d) no mango is sweet
6. 6.🧩 Enough evidence or not? “One mango in the box was sour, so all the mangoes are sour.” (a) not enough evidence (b) enough evidence
7. 7.True or false: “One mango in the box was sour, so all the mangoes are sour.” does not give enough evidence. (a) True (b) False
8. 8.🧩 Enough evidence or not? “We asked all 30 classmates; 25 chose the zoo trip.” (a) not enough evidence (b) enough evidence
9. 9.🧩 Meera bought 6 pens for ₹210 in all. Each pen cost the same. What did one pen cost? (a) ₹40 (b) ₹210 (c) not enough info (d) ₹35
10. 10.🧩 Tara is 7 years old. Ananya is 2 years older than Tara. How old is Ananya? (a) not enough info (b) 2 (c) 9 (d) 10
11. 11.🧩 Diya is 9 years old. Arjun is 9 years older than Diya. How old is Arjun? (a) 18 (b) not enough info (c) 9 (d) 19
12. 12.🧩 Arjun is 11 years old. Aarav is 4 years older than Arjun. How old is Aarav? (a) 4 (b) 15 (c) not enough info (d) 16
13. 13.🧩 Enough evidence or not? “We tested 20 seeds, and 18 of them sprouted.” (a) enough evidence (b) not enough evidence
14. 14.🧩 Before solving a word problem, first check… (a) the page number (b) your handwriting (c) the colour of ink (d) what facts are given
15. 15.True or false: “It rained on my birthday once, so it always rains on birthdays.” does not give enough evidence. (a) True (b) False
16. 16.🧩 Arjun bought 5 kites for ₹300 in all. Each kite cost the same. What did one kite cost? (a) ₹65 (b) ₹60 (c) ₹300 (d) not enough info
17. 17.🧩 The film starts at 5 PM and lasts 1 hour. When does it end? (a) 5 PM (b) 7 PM (c) not enough info (d) 6 PM
18. 18.True or false: “We measured the plant every day for a month; it grew 9 cm.” gives enough evidence. (a) True (b) False
19. 19.🧩 Ishaan bought 5 balls for ₹300 in all. Each ball cost the same. What did one ball cost? (a) ₹65 (b) ₹300 (c) not enough info (d) ₹60
20. 20.🧩 Kabir bought 5 kites for ₹225 in all. Each kite cost the same. What did one kite cost? (a) not enough info (b) ₹45 (c) ₹50 (d) ₹225
21. 21.🧩 Enough evidence or not? “We measured the plant every day for a month; it grew 9 cm.” (a) not enough evidence (b) enough evidence
22. 22.🧩 A box has 6 rows of oranges, with 6 in each row. How many oranges are in the box? (a) not enough info (b) 36 (c) 12 (d) 42
23. 23.🧩 The film starts at 3 PM. It is a long film. When does it end? (a) 6 PM (b) 4 PM (c) 5 PM (d) not enough info
24. 24.🧩 Enough evidence or not? “A dog barked at me once, so all dogs are mean.” (a) enough evidence (b) not enough evidence
25. 25.🧩 A box has 5 rows of eggs, with 5 in each row. How many eggs are in the box? (a) 25 (b) 30 (c) 10 (d) not enough info
26. 26.🧩 Vihaan bought 6 notebooks and a lunch box for ₹190 in all. Each notebook cost the same. What did one notebook cost? (a) ₹184 (b) not enough info (c) ₹190 (d) ₹31
27. 27.📊 Which gives the best evidence about the class’s favourite game? (a) guessing (b) asking your pet (c) asking the whole class (d) asking one friend
28. 28.🧩 A box has 3 rows of mangoes, with 5 in each row. How many mangoes are in the box? (a) 15 (b) 20 (c) not enough info (d) 8
29. 29.🧩 Ananya is 9 years old. Nisha is older than Ananya. How old is Nisha? (a) not enough info (b) 14 (c) 11 (d) 10
30. 30.🧩 Saanvi bought 6 pens for ₹150 in all. Each pen cost the same. What did one pen cost? (a) ₹150 (b) ₹30 (c) not enough info (d) ₹25
31. 31.🧩 Nisha bought 6 notebooks for ₹330 in all. Each notebook cost the same. What did one notebook cost? (a) not enough info (b) ₹330 (c) ₹55 (d) ₹60
32. 32.🧩 The film starts at 2 PM and lasts 3 hours. When does it end? (a) not enough info (b) 5 PM (c) 6 PM (d) 2 PM
33. 33.🧩 Rohan bought 4 notebooks for ₹120 in all. Each notebook cost the same. What did one notebook cost? (a) ₹35 (b) ₹30 (c) ₹120 (d) not enough info
34. 34.True or false: “We tried the new route for 10 days, and it was faster every day.” gives enough evidence. (a) False (b) True
35. 35.🧩 Enough evidence or not? “One student said the canteen food was cold, so it is always cold.” (a) not enough evidence (b) enough evidence
36. 36.🧩 A box of mangoes has 6 in each row. How many mangoes are in the box? (a) 6 (b) 60 (c) 12 (d) not enough info
37. 37.🧩 The film starts at 4 PM. It is a long film. When does it end? (a) 6 PM (b) not enough info (c) 5 PM (d) 7 PM
38. 38.📝 What does “evidence” mean? (a) a loud opinion (b) a guess (c) a rumour (d) facts that support it
39. 39.🧩 The film starts at 2 PM. It is a long film. When does it end? (a) 5 PM (b) not enough info (c) 3 PM (d) 4 PM
40. 40.🧩 A box of mangoes has 8 in each row. How many mangoes are in the box? (a) 8 (b) not enough info (c) 16 (d) 80

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