Evidence and Missing Information Worksheet

Critical thinking lesson 9: Enough evidence and missing information · Set 532 · 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.🧩 A box has 6 rows of guavas, with 7 in each row. How many guavas are in the box? (a) 49 (b) 13 (c) not enough info (d) 42
2. 2.🧩 Meera is 7 years old. Nisha is 5 years older than Meera. How old is Nisha? (a) not enough info (b) 12 (c) 5 (d) 13
3. 3.🧩 Ishaan bought 2 notebooks for ₹120 in all. Each notebook cost the same. What did one notebook cost? (a) ₹120 (b) not enough info (c) ₹60 (d) ₹65
4. 4.🔬 Why do scientists repeat an experiment? (a) to waste time (b) for fun only (c) to be sure of results (d) to change answers
5. 5.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
6. 6.🧩 Ananya bought 5 mangoes and a water bottle for ₹105 in all. Each mango cost the same. What did one mango cost? (a) ₹21 (b) not enough info (c) ₹105 (d) ₹100
7. 7.True or false: “One mango in the box was sour, so all the mangoes are sour.” gives enough evidence. (a) False (b) True
8. 8.🧩 A box of laddoos has 4 in each row. How many laddoos are in the box? (a) 40 (b) not enough info (c) 8 (d) 4
9. 9.🧩 Enough evidence or not? “One mango in the box was sour, so all the mangoes are sour.” (a) enough evidence (b) not enough evidence
10. 10.🧩 Enough evidence or not? “We checked all 40 mangoes in the box; every one was ripe.” (a) not enough evidence (b) enough evidence
11. 11.True or false: “One student said the canteen food was cold, so it is always cold.” gives enough evidence. (a) False (b) True
12. 12.True or false: “A dog barked at me once, so all dogs are mean.” gives enough evidence. (a) False (b) True
13. 13.🧩 Enough evidence or not? “We measured the plant every day for a month; it grew 9 cm.” (a) enough evidence (b) not enough evidence
14. 14.🧩 Aarav bought 6 mangoes and a bag for ₹350 in all. Each mango cost the same. What did one mango cost? (a) not enough info (b) ₹350 (c) ₹58 (d) ₹344
15. 15.🧩 Rohan is 9 years old. Vihaan is older than Rohan. How old is Vihaan? (a) not enough info (b) 10 (c) 14 (d) 11
16. 16.🧩 Before solving a word problem, first check… (a) your handwriting (b) the page number (c) the colour of ink (d) what facts are given
17. 17.📝 What does “evidence” mean? (a) a rumour (b) a guess (c) facts that support it (d) a loud opinion
18. 18.True or false: “It rained on my birthday once, so it always rains on birthdays.” gives enough evidence. (a) False (b) True
19. 19.🧩 Enough evidence or not? “We asked all 30 classmates; 25 chose the zoo trip.” (a) enough evidence (b) not enough evidence
20. 20.🧩 Rohan is 7 years old. Tara is 4 years older than Rohan. How old is Tara? (a) 12 (b) 11 (c) not enough info (d) 4
21. 21.True or false: “We asked all 30 classmates; 25 chose the zoo trip.” gives enough evidence. (a) True (b) False
22. 22.📊 Which gives the best evidence about the class’s favourite game? (a) guessing (b) asking one friend (c) asking your pet (d) asking the whole class
23. 23.🧩 Enough evidence or not? “It rained on my birthday once, so it always rains on birthdays.” (a) enough evidence (b) not enough evidence
24. 24.🧩 A box of oranges has 8 in each row. How many oranges are in the box? (a) 80 (b) 16 (c) not enough info (d) 8
25. 25.🧩 Arjun is 12 years old. Ananya is older than Arjun. How old is Ananya? (a) not enough info (b) 13 (c) 14 (d) 17
26. 26.🧩 Diya is 7 years old. Kabir is 2 years older than Diya. How old is Kabir? (a) not enough info (b) 10 (c) 9 (d) 2
27. 27.🥭 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
28. 28.🧩 Saanvi bought 5 balls for ₹175 in all. Each ball cost the same. What did one ball cost? (a) ₹40 (b) ₹35 (c) not enough info (d) ₹175
29. 29.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
30. 30.True or false: “One student said the canteen food was cold, so it is always cold.” does not give enough evidence. (a) True (b) False
31. 31.🧩 The film starts at 6 PM and lasts 1 hour. When does it end? (a) 8 PM (b) 7 PM (c) 6 PM (d) not enough info
32. 32.🧩 Diya is 6 years old. Kabir is 5 years older than Diya. How old is Kabir? (a) 12 (b) not enough info (c) 11 (d) 5
33. 33.🧩 Ishaan bought 3 pens for ₹105 in all. Each pen cost the same. What did one pen cost? (a) ₹40 (b) ₹105 (c) not enough info (d) ₹35
34. 34.🧩 Vihaan is 7 years old. Aarav is 3 years older than Vihaan. How old is Aarav? (a) 11 (b) 10 (c) not enough info (d) 3
35. 35.🧩 Aarav bought 3 markers for ₹75 in all. Each marker cost the same. What did one marker cost? (a) ₹25 (b) not enough info (c) ₹75 (d) ₹30
36. 36.🧩 The film starts at 2 PM. It is a long film. When does it end? (a) 4 PM (b) 5 PM (c) 3 PM (d) not enough info
37. 37.🧩 A box of oranges has 7 in each row. How many oranges are in the box? (a) 70 (b) 14 (c) not enough info (d) 7
38. 38.🧩 Enough evidence or not? “We tested 20 seeds, and 18 of them sprouted.” (a) enough evidence (b) not enough evidence
39. 39.🧩 A box of laddoos has 5 in each row. How many laddoos are in the box? (a) 50 (b) 10 (c) not enough info (d) 5
40. 40.🧩 Ishaan bought 5 markers for ₹250 in all. Each marker cost the same. What did one marker cost? (a) ₹250 (b) ₹55 (c) ₹50 (d) not enough info

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