Evidence and Missing Information Worksheet

Critical thinking lesson 9: Enough evidence and missing information · Set 649 · 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.🧩 Kabir is 10 years old. Aarav is 4 years older than Kabir. How old is Aarav? (a) not enough info (b) 4 (c) 14 (d) 15
2. 2.🧩 The film starts at 6 PM and lasts 2 hours. When does it end? (a) 9 PM (b) not enough info (c) 8 PM (d) 6 PM
3. 3.🧩 A box has 5 rows of oranges, with 6 in each row. How many oranges are in the box? (a) not enough info (b) 30 (c) 11 (d) 36
4. 4.True or false: “We checked all 40 mangoes in the box; every one was ripe.” does not give enough evidence. (a) True (b) False
5. 5.🐕 One dog barked at you. What is the fair conclusion? (a) never see dogs (b) that one dog barked (c) dogs hate you (d) all dogs are mean
6. 6.🧩 Enough evidence or not? “A dog barked at me once, so all dogs are mean.” (a) enough evidence (b) not enough evidence
7. 7.📊 Which gives the best evidence about the class’s favourite game? (a) asking your pet (b) asking the whole class (c) guessing (d) asking one friend
8. 8.🧩 Enough evidence or not? “One student said the canteen food was cold, so it is always cold.” (a) enough evidence (b) not enough evidence
9. 9.🧩 Aarav is 6 years old. Arjun is older than Aarav. How old is Arjun? (a) 8 (b) not enough info (c) 7 (d) 11
10. 10.🧩 Enough evidence or not? “One mango in the box was sour, so all the mangoes are sour.” (a) not enough evidence (b) enough evidence
11. 11.🧩 A box has 8 rows of laddoos, with 4 in each row. How many laddoos are in the box? (a) 32 (b) not enough info (c) 36 (d) 12
12. 12.🧩 The film starts at 6 PM. It is a long film. When does it end? (a) not enough info (b) 8 PM (c) 7 PM (d) 9 PM
13. 13.🧩 Diya is 7 years old. Kabir is 4 years older than Diya. How old is Kabir? (a) 11 (b) 4 (c) 12 (d) not enough info
14. 14.🧩 Tara bought 6 markers and a water bottle for ₹340 in all. Each marker cost the same. What did one marker cost? (a) not enough info (b) ₹340 (c) ₹56 (d) ₹334
15. 15.🧩 Ananya is 9 years old. Kabir is older than Ananya. How old is Kabir? (a) 14 (b) 11 (c) not enough info (d) 10
16. 16.🧩 Rohan bought 3 kites and a bag for ₹115 in all. Each kite cost the same. What did one kite cost? (a) ₹112 (b) ₹38 (c) not enough info (d) ₹115
17. 17.🧩 A box of eggs has 9 in each row. How many eggs are in the box? (a) not enough info (b) 90 (c) 9 (d) 18
18. 18.🧩 Arjun is 8 years old. Diya is 9 years older than Arjun. How old is Diya? (a) 18 (b) not enough info (c) 9 (d) 17
19. 19.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
20. 20.🧩 Enough evidence or not? “It rained on my birthday once, so it always rains on birthdays.” (a) enough evidence (b) not enough evidence
21. 21.🧩 Meera bought 3 markers for ₹75 in all. Each marker cost the same. What did one marker cost? (a) ₹25 (b) not enough info (c) ₹30 (d) ₹75
22. 22.🧩 Meera bought 2 notebooks for ₹30 in all. Each notebook cost the same. What did one notebook cost? (a) ₹30 (b) ₹15 (c) not enough info (d) ₹20
23. 23.🧩 Before solving a word problem, first check… (a) what facts are given (b) the page number (c) the colour of ink (d) your handwriting
24. 24.🧩 Enough evidence or not? “We checked all 40 mangoes in the box; every one was ripe.” (a) enough evidence (b) not enough evidence
25. 25.True or false: “We asked all 30 classmates; 25 chose the zoo trip.” does not give enough evidence. (a) True (b) False
26. 26.🧩 Kabir is 6 years old. Ananya is 9 years older than Kabir. How old is Ananya? (a) 16 (b) not enough info (c) 9 (d) 15
27. 27.🧩 Tara bought 6 pens and a bag for ₹260 in all. Each pen cost the same. What did one pen cost? (a) not enough info (b) ₹260 (c) ₹43 (d) ₹254
28. 28.🧩 A box has 7 rows of apples, with 8 in each row. How many apples are in the box? (a) 64 (b) 15 (c) not enough info (d) 56
29. 29.True or false: “A dog barked at me once, so all dogs are mean.” does not give enough evidence. (a) False (b) True
30. 30.🔬 Why do scientists repeat an experiment? (a) to waste time (b) for fun only (c) to be sure of results (d) to change answers
31. 31.True or false: “It rained on my birthday once, so it always rains on birthdays.” gives enough evidence. (a) True (b) False
32. 32.🧩 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
33. 33.🧩 Enough evidence or not? “We tested 20 seeds, and 18 of them sprouted.” (a) enough evidence (b) not enough evidence
34. 34.True or false: “We asked all 30 classmates; 25 chose the zoo trip.” gives enough evidence. (a) True (b) False
35. 35.🧩 Ishaan is 12 years old. Kabir is 4 years older than Ishaan. How old is Kabir? (a) not enough info (b) 16 (c) 17 (d) 4
36. 36.True or false: “We checked all 40 mangoes in the box; every one was ripe.” gives enough evidence. (a) False (b) True
37. 37.📝 What does “evidence” mean? (a) a loud opinion (b) facts that support it (c) a rumour (d) a guess
38. 38.True or false: “We measured the plant every day for a month; it grew 9 cm.” gives enough evidence. (a) False (b) True
39. 39.🧩 The film starts at 5 PM and lasts 3 hours. When does it end? (a) 9 PM (b) 8 PM (c) 5 PM (d) not enough info
40. 40.🧩 Nisha is 8 years old. Ishaan is older than Nisha. How old is Ishaan? (a) 9 (b) 13 (c) 10 (d) not enough info

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