Evidence and Missing Information Worksheet

Critical thinking lesson 9: Enough evidence and missing information · Set 255 · 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.🧩 Before solving a word problem, first check… (a) your handwriting (b) the colour of ink (c) the page number (d) what facts are given
2. 2.🧩 A box of mangoes has 5 in each row. How many mangoes are in the box? (a) 5 (b) not enough info (c) 10 (d) 50
3. 3.🧩 Rohan bought 2 balls and a water bottle for ₹200 in all. Each ball cost the same. What did one ball cost? (a) ₹200 (b) ₹198 (c) ₹100 (d) not enough info
4. 4.🧩 Aarav bought 2 markers for ₹110 in all. Each marker cost the same. What did one marker cost? (a) not enough info (b) ₹55 (c) ₹110 (d) ₹60
5. 5.🐕 One dog barked at you. What is the fair conclusion? (a) that one dog barked (b) all dogs are mean (c) never see dogs (d) dogs hate you
6. 6.🧩 Enough evidence or not? “We checked all 40 mangoes in the box; every one was ripe.” (a) not enough evidence (b) enough evidence
7. 7.🧩 Saanvi is 8 years old. Diya is 5 years older than Saanvi. How old is Diya? (a) 14 (b) not enough info (c) 5 (d) 13
8. 8.🧩 Rohan is 9 years old. Kabir is older than Rohan. How old is Kabir? (a) 11 (b) 14 (c) not enough info (d) 10
9. 9.🧩 A box has 5 rows of eggs, with 5 in each row. How many eggs are in the box? (a) 10 (b) not enough info (c) 25 (d) 30
10. 10.🧩 Ishaan bought 4 markers for ₹100 in all. Each marker cost the same. What did one marker cost? (a) ₹30 (b) ₹100 (c) not enough info (d) ₹25
11. 11.True or false: “We tested 20 seeds, and 18 of them sprouted.” gives enough evidence. (a) False (b) True
12. 12.🧩 The film starts at 6 PM and lasts 2 hours. When does it end? (a) 8 PM (b) 9 PM (c) 6 PM (d) not enough info
13. 13.🧩 Enough evidence or not? “One mango in the box was sour, so all the mangoes are sour.” (a) not enough evidence (b) enough evidence
14. 14.📊 Which gives the best evidence about the class’s favourite game? (a) asking the whole class (b) asking one friend (c) asking your pet (d) guessing
15. 15.🧩 Vihaan bought 2 mangoes and a lunch box for ₹120 in all. Each mango cost the same. What did one mango cost? (a) ₹60 (b) not enough info (c) ₹118 (d) ₹120
16. 16.🧩 The film starts at 5 PM. It is a long film. When does it end? (a) 8 PM (b) not enough info (c) 7 PM (d) 6 PM
17. 17.🧩 Tara bought 6 notebooks for ₹120 in all. Each notebook cost the same. What did one notebook cost? (a) ₹120 (b) ₹25 (c) not enough info (d) ₹20
18. 18.🧩 A box has 6 rows of guavas, with 4 in each row. How many guavas are in the box? (a) 10 (b) 28 (c) not enough info (d) 24
19. 19.🧩 Aarav is 7 years old. Nisha is 2 years older than Aarav. How old is Nisha? (a) 2 (b) not enough info (c) 10 (d) 9
20. 20.True or false: “It rained on my birthday once, so it always rains on birthdays.” gives enough evidence. (a) False (b) True
21. 21.🧩 Enough evidence or not? “We asked all 30 classmates; 25 chose the zoo trip.” (a) not enough evidence (b) enough evidence
22. 22.🧩 Ananya bought 5 pens for ₹200 in all. Each pen cost the same. What did one pen cost? (a) not enough info (b) ₹40 (c) ₹45 (d) ₹200
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.🥭 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, mangoes match (d) yes, it is certain
25. 25.🧩 A box of mangoes has 6 in each row. How many mangoes are in the box? (a) not enough info (b) 6 (c) 12 (d) 60
26. 26.📝 What does “evidence” mean? (a) a guess (b) a loud opinion (c) facts that support it (d) a rumour
27. 27.🧩 Enough evidence or not? “A dog barked at me once, so all dogs are mean.” (a) enough evidence (b) not enough evidence
28. 28.🔬 Why do scientists repeat an experiment? (a) to change answers (b) to waste time (c) for fun only (d) to be sure of results
29. 29.🧩 Meera is 11 years old. Ananya is 4 years older than Meera. How old is Ananya? (a) 15 (b) 4 (c) not enough info (d) 16
30. 30.True or false: “We asked all 30 classmates; 25 chose the zoo trip.” gives enough evidence. (a) False (b) True
31. 31.True or false: “We checked all 40 mangoes in the box; every one was ripe.” does not give enough evidence. (a) False (b) True
32. 32.🧩 Nisha is 7 years old. Kabir is 7 years older than Nisha. How old is Kabir? (a) 14 (b) 7 (c) not enough info (d) 15
33. 33.🧩 A box has 8 rows of mangoes, with 8 in each row. How many mangoes are in the box? (a) 16 (b) 64 (c) 72 (d) not enough info
34. 34.🧩 The film starts at 5 PM and lasts 1 hour. When does it end? (a) 6 PM (b) 7 PM (c) 5 PM (d) not enough info
35. 35.True or false: “One student said the canteen food was cold, so it is always cold.” gives enough evidence. (a) False (b) True
36. 36.🧩 Meera bought 2 kites for ₹50 in all. Each kite cost the same. What did one kite cost? (a) ₹30 (b) not enough info (c) ₹50 (d) ₹25
37. 37.🧩 Ananya is 7 years old. Arjun is 2 years older than Ananya. How old is Arjun? (a) 2 (b) 10 (c) 9 (d) not enough info
38. 38.True or false: “A dog barked at me once, so all dogs are mean.” gives enough evidence. (a) True (b) False
39. 39.🧩 Diya is 11 years old. Tara is 5 years older than Diya. How old is Tara? (a) 16 (b) not enough info (c) 17 (d) 5
40. 40.🧩 A box has 6 rows of apples, with 9 in each row. How many apples are in the box? (a) 15 (b) 63 (c) 54 (d) not enough info

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