Evidence and Missing Information Worksheet

Critical thinking lesson 9: Enough evidence and missing information · Set 412 · 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.🧩 Nisha is 11 years old. Aarav is 5 years older than Nisha. How old is Aarav? (a) 17 (b) 5 (c) 16 (d) not enough info
2. 2.🧩 Enough evidence or not? “A dog barked at me once, so all dogs are mean.” (a) not enough evidence (b) enough evidence
3. 3.🧩 Kabir bought 6 markers and a cap for ₹200 in all. Each marker cost the same. What did one marker cost? (a) ₹33 (b) ₹200 (c) ₹194 (d) not enough info
4. 4.True or false: “It rained on my birthday once, so it always rains on birthdays.” does not give enough evidence. (a) False (b) True
5. 5.🧩 Arjun bought 2 mangoes and a lunch box for ₹50 in all. Each mango cost the same. What did one mango cost? (a) ₹50 (b) ₹25 (c) not enough info (d) ₹48
6. 6.🧩 Rohan is 10 years old. Vihaan is older than Rohan. How old is Vihaan? (a) 11 (b) not enough info (c) 12 (d) 15
7. 7.🧩 Meera bought 5 pens and a water bottle for ₹360 in all. Each pen cost the same. What did one pen cost? (a) ₹72 (b) ₹360 (c) ₹355 (d) not enough info
8. 8.🧩 Enough evidence or not? “We tested 20 seeds, and 18 of them sprouted.” (a) enough evidence (b) not enough evidence
9. 9.📝 What does “evidence” mean? (a) facts that support it (b) a loud opinion (c) a rumour (d) a guess
10. 10.🧩 Before solving a word problem, first check… (a) your handwriting (b) the colour of ink (c) the page number (d) what facts are given
11. 11.True or false: “It rained on my birthday once, so it always rains on birthdays.” gives enough evidence. (a) True (b) False
12. 12.🧩 Enough evidence or not? “We measured the plant every day for a month; it grew 9 cm.” (a) enough evidence (b) not enough evidence
13. 13.True or false: “We tested 20 seeds, and 18 of them sprouted.” gives enough evidence. (a) True (b) False
14. 14.🧩 The film starts at 5 PM and lasts 2 hours. When does it end? (a) not enough info (b) 7 PM (c) 8 PM (d) 5 PM
15. 15.🧩 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
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.🧩 The film starts at 2 PM and lasts 3 hours. When does it end? (a) not enough info (b) 2 PM (c) 5 PM (d) 6 PM
18. 18.True or false: “We checked all 40 mangoes in the box; every one was ripe.” gives enough evidence. (a) False (b) True
19. 19.🧩 Enough evidence or not? “It rained on my birthday once, so it always rains on birthdays.” (a) not enough evidence (b) enough evidence
20. 20.🐕 One dog barked at you. What is the fair conclusion? (a) never see dogs (b) all dogs are mean (c) dogs hate you (d) that one dog barked
21. 21.True or false: “We measured the plant every day for a month; it grew 9 cm.” does not give enough evidence. (a) False (b) True
22. 22.🧩 Arjun is 9 years old. Ananya is 5 years older than Arjun. How old is Ananya? (a) 15 (b) 14 (c) not enough info (d) 5
23. 23.🧩 Arjun bought 2 kites for ₹50 in all. Each kite cost the same. What did one kite cost? (a) ₹50 (b) ₹30 (c) not enough info (d) ₹25
24. 24.🧩 Enough evidence or not? “We asked all 30 classmates; 25 chose the zoo trip.” (a) enough evidence (b) not enough evidence
25. 25.🧩 Enough evidence or not? “We checked all 40 mangoes in the box; every one was ripe.” (a) not enough evidence (b) enough evidence
26. 26.🧩 Vihaan bought 2 mangoes and a cap for ₹130 in all. Each mango cost the same. What did one mango cost? (a) ₹128 (b) ₹130 (c) not enough info (d) ₹65
27. 27.🧩 Nisha bought 3 notebooks and a cap for ₹75 in all. Each notebook cost the same. What did one notebook cost? (a) ₹72 (b) ₹75 (c) ₹25 (d) not enough info
28. 28.True or false: “One student said the canteen food was cold, so it is always cold.” does not give enough evidence. (a) False (b) True
29. 29.🧩 Ananya bought 2 pens for ₹40 in all. Each pen cost the same. What did one pen cost? (a) ₹40 (b) ₹20 (c) not enough info (d) ₹25
30. 30.🧩 Aarav is 6 years old. Saanvi is 4 years older than Aarav. How old is Saanvi? (a) 4 (b) not enough info (c) 10 (d) 11
31. 31.🧩 A box has 8 rows of mangoes, with 7 in each row. How many mangoes are in the box? (a) 15 (b) 63 (c) not enough info (d) 56
32. 32.🧩 Rohan bought 2 mangoes and a water bottle for ₹120 in all. Each mango cost the same. What did one mango cost? (a) ₹118 (b) ₹120 (c) not enough info (d) ₹60
33. 33.🧩 Rohan bought 3 pens for ₹180 in all. Each pen cost the same. What did one pen cost? (a) ₹180 (b) ₹65 (c) ₹60 (d) not enough info
34. 34.🥭 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) no, check more (c) yes, it is certain (d) yes, mangoes match
35. 35.🧩 A box has 4 rows of guavas, with 5 in each row. How many guavas are in the box? (a) 25 (b) 9 (c) not enough info (d) 20
36. 36.🧩 The film starts at 5 PM. It is a long film. When does it end? (a) 7 PM (b) 8 PM (c) not enough info (d) 6 PM
37. 37.🧩 Kabir is 6 years old. Meera is 7 years older than Kabir. How old is Meera? (a) 14 (b) not enough info (c) 7 (d) 13
38. 38.🧩 A box of laddoos has 9 in each row. How many laddoos are in the box? (a) 18 (b) not enough info (c) 9 (d) 90
39. 39.🧩 The film starts at 6 PM and lasts 2 hours. When does it end? (a) 9 PM (b) 6 PM (c) 8 PM (d) not enough info
40. 40.True or false: “My friend didn’t like the book, so the book is bad for everyone.” does not give enough evidence. (a) True (b) False

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