Evidence and Missing Information Worksheet

Critical thinking lesson 9: Enough evidence and missing information · Set 590 · 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.🧩 Vihaan bought 5 notebooks for ₹100 in all. Each notebook cost the same. What did one notebook cost? (a) ₹20 (b) not enough info (c) ₹100 (d) ₹25
2. 2.True or false: “It rained on my birthday once, so it always rains on birthdays.” gives enough evidence. (a) True (b) False
3. 3.🧩 Nisha bought 2 kites for ₹80 in all. Each kite cost the same. What did one kite cost? (a) ₹80 (b) not enough info (c) ₹40 (d) ₹45
4. 4.🧩 Nisha bought 2 kites for ₹60 in all. Each kite cost the same. What did one kite cost? (a) ₹35 (b) ₹60 (c) ₹30 (d) not enough info
5. 5.🧩 A box of apples has 6 in each row. How many apples are in the box? (a) 60 (b) not enough info (c) 12 (d) 6
6. 6.🔬 Why do scientists repeat an experiment? (a) for fun only (b) to change answers (c) to be sure of results (d) to waste time
7. 7.🧩 Aarav is 6 years old. Ishaan is 6 years older than Aarav. How old is Ishaan? (a) 13 (b) 6 (c) 12 (d) not enough info
8. 8.🧩 A box of mangoes has 4 in each row. How many mangoes are in the box? (a) not enough info (b) 8 (c) 40 (d) 4
9. 9.🧩 Ananya bought 4 markers for ₹220 in all. Each marker cost the same. What did one marker cost? (a) ₹220 (b) not enough info (c) ₹55 (d) ₹60
10. 10.🧩 The film starts at 5 PM and lasts 3 hours. When does it end? (a) 9 PM (b) 8 PM (c) not enough info (d) 5 PM
11. 11.🧩 Meera is 10 years old. Saanvi is 7 years older than Meera. How old is Saanvi? (a) 17 (b) 18 (c) not enough info (d) 7
12. 12.True or false: “It rained on my birthday once, so it always rains on birthdays.” does not give enough evidence. (a) False (b) True
13. 13.📝 What does “evidence” mean? (a) a rumour (b) a loud opinion (c) a guess (d) facts that support it
14. 14.🐕 One dog barked at you. What is the fair conclusion? (a) all dogs are mean (b) that one dog barked (c) dogs hate you (d) never see dogs
15. 15.🧩 Kabir is 7 years old. Nisha is 5 years older than Kabir. How old is Nisha? (a) 13 (b) 12 (c) not enough info (d) 5
16. 16.🧩 Enough evidence or not? “One student said the canteen food was cold, so it is always cold.” (a) not enough evidence (b) enough evidence
17. 17.🧩 Vihaan is 6 years old. Ananya is 4 years older than Vihaan. How old is Ananya? (a) 11 (b) 4 (c) not enough info (d) 10
18. 18.True or false: “A dog barked at me once, so all dogs are mean.” gives enough evidence. (a) True (b) False
19. 19.🧩 Ananya is 6 years old. Arjun is 4 years older than Ananya. How old is Arjun? (a) 10 (b) 11 (c) 4 (d) not enough info
20. 20.🧩 A box has 6 rows of guavas, with 8 in each row. How many guavas are in the box? (a) 48 (b) not enough info (c) 56 (d) 14
21. 21.🧩 Saanvi bought 5 notebooks for ₹125 in all. Each notebook cost the same. What did one notebook cost? (a) not enough info (b) ₹30 (c) ₹25 (d) ₹125
22. 22.🧩 Enough evidence or not? “We asked all 30 classmates; 25 chose the zoo trip.” (a) enough evidence (b) not enough evidence
23. 23.🧩 Meera bought 3 balls for ₹75 in all. Each ball cost the same. What did one ball cost? (a) ₹30 (b) ₹75 (c) ₹25 (d) not enough info
24. 24.🧩 The film starts at 3 PM. It is a long film. When does it end? (a) not enough info (b) 4 PM (c) 6 PM (d) 5 PM
25. 25.🧩 The film starts at 2 PM. It is a long film. When does it end? (a) 4 PM (b) 5 PM (c) not enough info (d) 3 PM
26. 26.🧩 Enough evidence or not? “We measured the plant every day for a month; it grew 9 cm.” (a) enough evidence (b) not enough evidence
27. 27.🧩 Tara is 12 years old. Ananya is 2 years older than Tara. How old is Ananya? (a) 15 (b) 14 (c) 2 (d) not enough info
28. 28.🧩 A box of mangoes has 5 in each row. How many mangoes are in the box? (a) 5 (b) 10 (c) 50 (d) not enough info
29. 29.🧩 Enough evidence or not? “A dog barked at me once, so all dogs are mean.” (a) not enough evidence (b) enough evidence
30. 30.🧩 Diya is 7 years old. Ananya is 4 years older than Diya. How old is Ananya? (a) 12 (b) 4 (c) 11 (d) not enough info
31. 31.🧩 Nisha bought 2 kites for ₹20 in all. Each kite cost the same. What did one kite cost? (a) not enough info (b) ₹10 (c) ₹20 (d) ₹15
32. 32.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
33. 33.🧩 Arjun is 8 years old. Aarav is older than Arjun. How old is Aarav? (a) 13 (b) 10 (c) 9 (d) not enough info
34. 34.🧩 Kabir bought 4 notebooks for ₹180 in all. Each notebook cost the same. What did one notebook cost? (a) ₹180 (b) not enough info (c) ₹50 (d) ₹45
35. 35.True or false: “We checked all 40 mangoes in the box; every one was ripe.” gives enough evidence. (a) False (b) True
36. 36.📊 Which gives the best evidence about the class’s favourite game? (a) asking your pet (b) asking one friend (c) asking the whole class (d) guessing
37. 37.🧩 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
38. 38.🧩 Before solving a word problem, first check… (a) the colour of ink (b) the page number (c) what facts are given (d) your handwriting
39. 39.🧩 A box has 3 rows of eggs, with 5 in each row. How many eggs are in the box? (a) 20 (b) 15 (c) 8 (d) not enough info
40. 40.🧩 Enough evidence or not? “We tested 20 seeds, and 18 of them sprouted.” (a) enough evidence (b) not enough evidence

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